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Run your analysis now →https://www.patsnap.com/resources/blog/rd-blog/perovskite-silicon-tandem-cells-patent-landscape/ · Patsnap · data cut-off 2026-07-31 · downloaded from the live page
Patent Landscape · Perovskite Silicon Tandem CellsPerovskite silicon tandem cell patents: who holds the claims and where filing is heading
- 21.6% concentration at the top. The five leading assignees account for 629 of 2,909 records in scope, a narrower base than the long tail of single- and few-filing entrants below them.
- Filing has cooled from its 2018 peak. Annual filings ran 179 at the 2018 peak, and completed-year filings fell from 143 in 2021 to 92 in 2024, a -36% move over that span.
- H01L dominates, H10F barely registers. 77.8% of records sit in H01L (semiconductor devices) versus 4.2% in H10F (photovoltaic devices proper), a gap worth understanding before you file.
2,909
Published Records
22%
Top-5 Share of All Records
-36%
Filing Growth 2021→2024
US
Leading Jurisdiction
Filing growth compares 2021 (143 records) with 2024 (92) — a three-year span. 2024 is the most recent year we treat as complete: publication lags filing by roughly 18 months, so 2025 onwards are still filling in and any growth rate that ends there would understate the field. Top-5 share is the combined record count of the five largest assignees divided by all 2,909 records in scope (CR5), not by the ranked leaders only.
Published byPatsnap Research··7 min readSourced from Patsnap Eureka
Overview
What this dataset covers
This landscape draws on 2,909 published records matched against tandem-cell and current-matching terminology spanning 2015 through the 2026-07-31 cut-off. The search string pairs architecture terms — perovskite silicon tandem, recombination layer — with performance and process terms such as current matching, textured silicon bottom, transparent conductive oxide and open circuit voltage, so the corpus centres on device stacks and their electrical/optical tuning rather than perovskite chemistry alone.
Publication lags filing by roughly 18 months, so 2025 and 2026 figures are still filling in and should not be read as a slowdown in actual filing activity. The most reliable read on direction comes from comparing complete years, 2021 through 2024.
Filing activity, 2017-2026
Source: Patsnap Eureka. Assignee ranking and totals. Derived from a Patsnap search on Perovskite Silicon Tandem Cells covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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The numbers
Filing trend and technology composition
Two views of the same 2,909 records: how filing volume has moved year over year, and which IPC subclasses the claims actually sit in.
A 2018 peak followed by a multi-year pullback
Filings ran 147 in 2017 and peaked at 179 in 2018. Complete-year data then shows a decline from 143 filings in 2021 to 92 in 2024, a -36% move — the clearest signal available once the still-filling-in 2025-2026 years are set aside.
H01L and H10K carry the bulk of the claim activity
H01L (semiconductor devices) appears in 77.8% of the 2,909 records and H10K (organic semiconductors, OLED-adjacent) in 48.1% — both far ahead of H10F (photovoltaic devices specifically) at 4.2%, C23C (coating and surface deposition) at 3.7% and B82Y (nanotechnology applications) at 2.8%. Because a record can carry several classes these shares sum to well over 100%, which is expected given how tandem-cell claims typically span device structure, deposition process and materials chemistry in a single filing.
Shares are the percentage of the 2,909 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Source: Patsnap Eureka. Filing trend and technology composition. Derived from a Patsnap search on Perovskite Silicon Tandem Cells covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.
Go deeper on Perovskite Silicon Tandem Cells with Eureka
This page is one run against one query. Ask Eureka your own question about perovskite silicon tandem cells and every answer comes back with the patent numbers behind it.
Try EurekaPrior art
Representative filing and most-cited records
Representative record
US11756744B1 — Three-tandem perovskite/silicon-based tandem solar cell
KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
A three-tandem (3T) perovskite/silicon (PVT)-based tandem solar cell (TSC) includes an antireflection coating, a first transparent conductive oxide layer, a hole transport layer, a perovskite layer, a second transparent conductive oxide layer, an electron transport layer, a plurality of buried contacts, a p-type Si layer, a p-type wafer-based homo-junction silicon solar cell, an n+ silicon layer and a back contact layer. The device is structured as a top sub-cell built on the perovskite layer, a bottom sub-cell built on the silicon solar cell, and a middle contact-based tandem joining the two.Filed by King Fahd University of Petroleum and Minerals, granted 2023-09-12.
Highest-cited records in the corpus
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20080170982A1 | Fabrication and Application of Nanofiber Ribbons and Sheets and Twisted and Non-Twisted Nanofiber Yarns | 1,266 |
| 2 | US20100288362A1 | Internal connector for organic electronic devices | 841 |
| 3 | WO2014045021A1 | Optoelectronic device | 516 |
| 4 | US6111189A | Photovoltaic module framing system with integral electrical raceways | 491 |
| 5 | US6288325B1 | Producing thin film photovoltaic modules with high integrity interconnects and dual layer contacts | 447 |
| 6 | US4891330A | Method of fabricating n-type and p-type microcrystalline semiconductor alloy material including band gap wide… | 436 |
| 7 | US6340788B1 | Multijunction photovoltaic cells and panels using a silicon or silicon-germanium active substrate cell for sp… | 428 |
| 8 | WO2007015710A2 | The fabrication and application of nanofiber ribbons and sheets and twisted and non-twisted nanofiber yarns | 383 |
| 9 | US6465724B1 | Photovoltaic module framing system with integral electrical raceways | 370 |
| 10 | US5118361A | Terrestrial concentrator solar cell module | 355 |
Citation counts favour older filings simply because they have had longer to accumulate references — treat them as a marker of influence on subsequent filers, not as a ranking of current technical relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
Source: Patsnap Eureka. Citation counts and representative records. Derived from a Patsnap search on Perovskite Silicon Tandem Cells covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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What the data means for filing strategy
Three patterns stand out once the raw counts are put in context: where volume concentrates, where it doesn't, and how the cited prior art shapes freedom to operate.
Concentration
21.6%
of 2,909 records held by top 5 assignees
The top of the field is narrower than the record count suggests
Five assignees hold 629 of the 2,909 records in scope, 21.6% of the total, while the ranked leaders extend across 100 companies with a long tail of single- and few-filing entrants below tenth place (44 records). That gap between fifth (83) and the tail means most of the corpus is thin filing, not concentrated defence.
Based on the assignee ranking of 100 companies.
Direction
-36%
complete-year filing change, 2021 to 2024
Volume has pulled back from its 2018 high
Annual filings peaked at 179 in 2018 and completed-year data shows 143 filings in 2021 falling to 92 in 2024. That is a real three-year decline, not an artefact of publication lag, since all four years in that window are past the roughly 18-month lag window.
2025-2026 figures are excluded as still incomplete.
Class skew
77.8% vs 4.2%
H01L share vs H10F share of 2,909 records
Claims cluster in semiconductor structure, not photovoltaic-specific classes
H01L appears in 77.8% of records and H10K in 48.1%, while H10F — the subclass specifically for photovoltaic and light-sensitive devices — appears in only 4.2%. That skew suggests most applicants are framing tandem-cell inventions as general semiconductor-device or organic-semiconductor claims rather than dedicated PV claims, which matters when scoping a freedom-to-operate search.
IPC shares sum above 100% because records carry multiple classes.
Eureka AI Agent
Looking for what nobody has claimed yet?
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to perovskite silicon tandem cells, with the prior art for and against each one.
Source: Patsnap Eureka. Co-assignee relationships and derived observations. Derived from a Patsnap search on Perovskite Silicon Tandem Cells covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
Assignees
Who is filing, and where momentum is fading
The ranked leaders show heavy recent pullback rather than steady build-out — a pattern worth checking before assuming any single filer still dominates active prosecution.
Leader
158
records, most of any assignee
A single leader well ahead of second place
The top-ranked assignee holds 158 records, comfortably ahead of the field, though recent-year momentum data for several leading university and corporate filers shows year-on-year declines of -86% to -100%, suggesting the historic lead is not being actively extended.
Momentum figures reflect the latest tracked year versus the prior year.
Mid-field
44
records at tenth place
A steep drop-off after the top ten
Tenth place sits at 44 records against a leader of 158, and the top ten combined account for 931 records, 32.0% of the 2,909 in scope. Below that line, filing thins quickly across the remaining ranked assignees.
Top 10 combined: 32.0% of all records in scope.
Collaboration
10
identified co-assignee pairs
Collaboration is concentrated among a few repeat pairings
Only ten co-assignee pairs are identified in the ranking, with the strongest pairing tied to two university filers and a second cluster linking a solar manufacturer to its own subsidiary and holding entities. That is a narrow collaboration footprint relative to the size of the ranked field.
Based on the ten strongest identified co-assignee pairs.
Recent-year filing momentum by assignee
| Assignee | Recent year | YoY |
|---|---|---|
| Zhejiang Jinko Solar Co., Ltd. | 3 | -86% |
| The Regents of the University of Michigan | 0 | -100% |
| The Trustees of Princeton University | 0 | — |
| Oxford Photovoltaics Ltd. | 0 | -100% |
| Oxford University Innovation Ltd. | 0 | — |
| University of Southern California | 0 | — |
| SolAero Technologies Corp. | 0 | — |
| Merck Patent GmbH | 0 | — |
Source: Patsnap Eureka. Assignee-level momentum. Derived from a Patsnap search on Perovskite Silicon Tandem Cells covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
Next steps
Where to take this analysis
The landscape figures point to specific follow-up questions rather than a single conclusion — pick the one that matches the decision in front of you.
Check freedom to operate against the top ten
With 32.0% of records held by ten assignees, a targeted clearance search against that group before broadening to the full ranked field is the more efficient sequence.
Run a clearance search in Eureka →Map the under-claimed IPC branches
H10F, C23C and B82Y sit well below H01L and H10K in record share, which is where a first claim may face less crowded prior art.
Explore white space in Eureka →Track momentum, not just historic volume
Several leading filers show sharp year-on-year declines, so ranking by cumulative record count alone can overstate who is currently active.
Watch assignee momentum in Eureka →Source: Patsnap Eureka. Forward-looking reading of the same dataset. Derived from a Patsnap search on Perovskite Silicon Tandem Cells covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
FAQ
Common questions about perovskite silicon tandem cell patents
The ranked leaders in this dataset are led by a single assignee with 158 records, well ahead of second place, out of a ranking of 100 companies covering 2,909 records in total. The top five assignees combined account for 629 records, 21.6% of the field, and the top ten account for 931 records, 32.0%. Recent-year momentum data shows several of these leading filers, including major university assignees, pulled back sharply in the most recent tracked year, so cumulative rank and current filing activity do not always match.
Annual filings peaked at 179 in 2018 and completed-year data shows a decline from 143 filings in 2021 to 92 in 2024, a -36% change over that span. Figures for 2025 and 2026 are still incomplete because publication typically lags filing by around 18 months, so they understate true activity and should not be read as confirming a slowdown. The most reliable comparison is between complete years, which does show a real pullback from the 2018 peak.
H01L (semiconductor devices) appears in 77.8% of the 2,909 records in scope and H10K (organic semiconductors) in 48.1%, making these the dominant classification codes. Photovoltaic-specific class H10F appears in only 4.2% of records, with coating and deposition class C23C at 3.7% and nanotechnology class B82Y at 2.8%. Because records often carry multiple IPC codes these shares add up to more than 100%, reflecting that a single tandem-cell claim typically spans device structure, materials and process together.
US11756744B1, assigned to King Fahd University of Petroleum and Minerals and granted 2023-09-12, describes a three-tandem (3T) perovskite/silicon solar cell built from a top perovskite sub-cell, a bottom silicon homo-junction sub-cell, and a middle contact-based tandem joining them, along with specific transparent conductive oxide, hole transport, electron transport and buried-contact layers. It is a useful reference point for the device architecture this landscape covers, but it is one filing among 2,909 records and its claim scope needs reading in full against the specific layer stack and contact scheme you intend to use, not assumed from the abstract alone. Anyone designing a similar three-terminal tandem stack should check its claims against their own layer sequence and contact architecture directly.
The class-level data shows filing concentrated in H01L and H10K, general semiconductor and organic-semiconductor codes, while photovoltaic-specific class H10F sits at just 4.2% of the 2,909 records and coating/deposition class C23C at 3.7%. That gap suggests claims specifically targeting textured bottom-cell current matching, recombination-layer conformal coverage, and transparent-conductive-oxide integration for tandem top-cells are less densely covered than general device-structure claims. Those branches are worth a dedicated novelty search before committing claim language, since thinner class-level coverage does not guarantee an easier filing but does indicate less occupied claim space.
Answers are grounded in the same dataset. Derived from a Patsnap search on Perovskite Silicon Tandem Cells covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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Disclaimer. This page is generated from Patsnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company's registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.