Perovskite Stability & Durability Patent Landscape 2026
The perovskite stability and durability space is in active growth, with filings accelerating sharply from 2021 onward and China’s solar and battery manufacturers now dominating the applicant pool. Activity is concentrated but still fragmented enough that well-targeted R&D can establish defensible positions, particularly in adjacent chemistry and semiconductor-device branches.
Trina Solar leads a China-heavy field with moderate top-tier concentration
Trina Solar Co Ltd holds the leading position with 99 patent families, ahead of Contemporary Amperex Technology Co Ltd (CATL) at 66 and Huaneng Clean Energy Research Institute at 53. The top five filers account for 19% of the combined output of the hundred largest applicants, signalling that leadership exists but the field is not yet locked up by one or two players.
A clear two-tier structure is visible: Trina Solar and CATL have a material lead over the third-ranked applicant and below. The gap narrows quickly from rank 3 onward, with several industrial firms and universities clustered between 20 and 40 patent families. This suggests that challengers can still close the gap with focused filing programs.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | Trina Solar Co Ltd | 99 | |
| 2 | Contemporary Amperex Technology Co Ltd | 66 | |
| 3 | Huaneng Clean Energy Research Institute Co Ltd | 53 | |
| 4 | Wuxi Utmost Light Technology Co Ltd | 39 | |
| 5 | Contemporary Amperex Technology (Hong Kong) Limited | 39 | |
| 6 | Chint New Energy Technology Co Ltd | 37 | |
| 7 | Xian TJ-Solar New Energy Co Ltd | 37 | |
| 8 | Northwestern Polytechnical University | 30 | |
| 9 | Suzhou University | 27 | |
| 10 | Hanwha Solutions Corporation | 26 |
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 11 | Wuhan University | 25 | |
| 12 | Contemporary Amperex Future Energy Research Institute (Shanghai) Co Ltd | 24 | |
| 13 | Nankai University | 24 | |
| 14 | Tianjin Aiko Solar Energy Technology Co Ltd | 23 | |
| 15 | Zhejiang Aiko Solar Energy Technology Co Ltd | 23 | |
| 16 | Zhuhai Fushan Aiko Solar Energy Technology Co Ltd | 23 | |
| 17 | Renshuo Photonics (Suzhou) Co Ltd | 23 | |
| 18 | Guangdong Aiko Solar Energy Technology Co Ltd | 23 | |
| 19 | Tongwei Solar Energy (Chengdu) Co Ltd | 22 | |
| 20 | China Three Gorges Corporation | 21 |
The fact that the top two positions are held by a solar module manufacturer and a battery giant — rather than pure chemistry or device-physics research houses — indicates that the field has crossed from exploratory research into application-driven IP accumulation, with commercial deployment timelines now shaping filing strategies.
The most recent 18–24 months of data are subject to publication lag and likely understate actual filing volumes; treat figures from 2025–2026 as preliminary. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Explosive growth since 2021 driven almost entirely by organic-semiconductor device filings
Two structural features define this landscape: a step-change acceleration in annual filings beginning in 2022, and a technology mix that is overwhelmingly concentrated in H10K (organic semiconductors / perovskite device architecture), with a long tail of adjacent chemistry and materials branches.
Annual filing trend
Filings were modest through 2020, then surged — rising from 46 families in 2021 to 221 in 2022, 517 in 2023, and 695 in 2024. The 2025 figure of 587 and the 2026 stub of 59 are understated by publication lag and should not be read as a slowdown; the underlying trajectory remains upward.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H10K (organic semiconductors, including perovskite photovoltaic device architecture) accounts for the dominant share of filings. H01L (semiconductor devices) is the next largest branch, followed by organometallic chemistry (C07F), heterocyclic compounds (C07D), and metal compound synthesis (C01G). Coating and surface-deposition methods (C23C) and nanotechnology applications (B82Y) represent smaller but technically relevant adjacent clusters.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
Perovskite solar cell, preparation method thereof,…
Embodiments of this application provide a perovskite solar cell, a preparation method thereof, and an electric device. The perovskite solar cell includes: a back plate; a transparent substrate, where a sealed cavity is formed between the transparent substrate and the back plate; and a perovskite solar cell device, where the perovskite solar cell device is… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | 一种钙钛矿太阳能电池的化学气相沉积制备方法 | 69 |
| 2 | 一种平面异质结钙钛矿太阳能电池及其制备方法 | 54 |
| 3 | Monolithic Tandem Chalcopyrite-Perovskite Photovol… | 43 |
| 4 | 一种铯铅溴无机钙钛矿薄膜的制备方法及基于其的光伏器件 | 35 |
| 5 | Tandem solar cell and method of manufacturing the … | 31 |
| 6 | 基于镧系稀土离子掺杂CsPbBr3的全无机钙钛矿太阳能电池及其制备方法和应用 | 30 |
| 7 | 一种高效钙钛矿太阳能电池及其制备方法 | 27 |
| 8 | 一种SnO2多孔结构钙钛矿光伏电池及其制备方法 | 26 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
What the competitive structure means for R&D investment decisions
The combination of a growth lifecycle, Chinese industrial dominance, active corporate-corporate co-filing, and thin coverage outside. China creates several strategic considerations for teams evaluating where to build IP.
Active growth phase — annual filings still rising
The field is in a Growth stage: annual filing volumes have risen sharply since 2021 and the evidence does not indicate any easing from the 2024 peak. A multi-year growth rate of approximately 1,362% confirms that the field is far from saturation. Early movers have established volume leads, but the window to stake out sub-domain positions in stability mechanisms, encapsulants, and interface engineering remains open.
Growth stageModerate top-tier concentration with a reachable second tier
The top five filers hold 19% of the output of the hundred largest applicants, and the gap between ranks 1 and 3 is already meaningful (99 vs. 53 patent families). However, applicants ranked 4 through 20 are closely bunched between 21 and 39 families, meaning second-tier status is achievable with a disciplined 2–3 year filing program. New entrant momentum across the top applicants underscores that the current rankings are not yet locked in.
Moderate concentrationIntra-group and utility-institute co-filing dominate collaboration patterns
The most active co-filing relationship is between Contemporary Amperex Technology Co Ltd and its dedicated research affiliate Contemporary Amperex Future Energy Research Institute (Shanghai), with 24 jointly filed families. Huaneng Clean Energy Research Institute co-files actively with both Huaneng Qinghai Power Generation Co Ltd and Huaneng New Energy (15 families each) and has a smaller link to Tsinghua University (2 families). Northwestern Polytechnical University is the most collaborative academic node, maintaining ties to Suzhou University, Shenzhen Manern Optoelectronics, and Nanjing University of Technology. Cross-sector university–industry collaboration remains limited in scale.
Corporate-led co-filingChina overwhelmingly dominant; Western jurisdictions underpenetrated
China accounts for the large majority of filings by jurisdiction count, followed at a significant distance by the United States, Europe (EPO), and WIPO PCT. South Korea and India appear as secondary markets. Japan, Canada, and most European national offices have single-digit or no significant presence. For non-Chinese applicants, filing in China via direct or PCT routes is strategically necessary; for Chinese players, US and EPO coverage of their core stability inventions is sparse relative to their domestic portfolios, creating freedom-to-operate opportunities for Western entrants.
China-led, US/EP gapsGo beyond the landscape: Eureka’s TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
| Applicant | Collaborator | Co-filings |
|---|---|---|
| Contemporary Amperex Technology Co Ltd | Contemporary Amperex Future Energy Research Institute (Shanghai) Co Ltd | 24 |
| Huaneng Clean Energy Research Institute Co Ltd | Huaneng Qinghai Power Generation Co Ltd | 15 |
| Huaneng Clean Energy Research Institute Co Ltd | Huaneng Renewables Corporation Limited | 15 |
| Northwestern Polytechnical University | Northwestern Polytechnical University Shenzhen Research Institute | 4 |
| Huaneng Clean Energy Research Institute Co Ltd | Tsinghua University | 2 |
| Northwestern Polytechnical University | Suzhou University | 2 |
| Northwestern Polytechnical University | Shenzhen Manern Optoelectronics Technology Co Ltd | 2 |
| Northwestern Polytechnical University | Nanjing University of Technology | 2 |
| Suzhou University | Nanjing University of Technology | 2 |
| Trina Solar Co Ltd | Trina Solar (Changzhou) Technology Co Ltd | 1 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Trina Solar and CATL lead on volume; both entered as new filers with rapid ramp-ups
The top two applicants are large industrial corporations, not specialist photovoltaic-chemistry firms, reflecting the field’s commercial maturation. Both show a new-entrant trajectory, meaning their recent-period filings represent the near-entirety of their corpus — a sign of fast, intentional IP build-outs rather than long-term organic accumulation.
Trina Solar Co Ltd
Trina Solar holds 99 patent families and is the top-ranked applicant in this space. Its technology focus is concentrated almost entirely within H10K (organic semiconductor / perovskite device architecture), with H10K30, H10K71, and H10K85 as the primary sub-classes. Applicant momentum is classified as a new entrant, with 60 recent families representing a rapid, intentional IP ramp. This positions Trina Solar as the benchmark against which other industrial players are measuring their own filing programs.
families: 99Contemporary Amperex Technology Co Ltd
CATL ranks second with 66 patent families, leveraging its electrochemistry and materials-science capabilities to extend into perovskite stability. Its technology focus mirrors Trina Solar’s H10K concentration (H10K30, H10K85, H10K71), and it co-files actively with its dedicated research institute Contemporary Amperex Future Energy Research Institute (Shanghai). Momentum is also flagged as new entrant, with 83 recent families — the highest recent-period count among the top applicants — suggesting CATL’s filing rate may challenge Trina Solar’s cumulative lead in the near term.
families: 66| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Trina Solar Co Ltd | 60 | ▲ new entrant |
| Contemporary Amperex Technology Co Ltd | 83 | ▲ new entrant |
| Huaneng Clean Energy Research Institute Co Ltd | 31 | ▲ new entrant |
| Wuxi Utmost Light Technology Co Ltd | 37 | ▲ new entrant |
| Xian TJ-Solar New Energy Co Ltd | 35 | ▲ new entrant |
| Chint New Energy Technology Co Ltd | 34 | ▲ new entrant |
| Northwestern Polytechnical University | 13 | ▲ new entrant |
| Suzhou University | 14 | ▲ new entrant |
Under-served IPC branches adjacent to the dominant device-architecture cluster
Several IPC branches appear at materially lower filing densities relative to H10K, representing areas where the technical relevance to perovskite stability is plausible but current patent coverage is thin. These are observations of relative sparsity — not validated market opportunities — and should be assessed alongside freedom-to-operate and prior-art searches before committing R&D resources.
C07F · Organometallic & Non-Carbon Compounds
With 106 patent families recorded under C07F, organometallic precursor chemistry is the largest of the sparse adjacent branches. Perovskite stability is strongly influenced by the choice of A-site and B-site organic cations, and organometallic passivation agents are an active research area. The relatively low filing count suggests that precursor and additive chemistry is underprotected relative to device-level claims. Teams with synthetic chemistry expertise could build differentiated positions here, particularly around tin-based or mixed-halide systems where toxicity and stability trade-offs remain unsolved.
Search this in Eureka →C23C · Coating & Surface Deposition
C23C covers coating processes and surface deposition techniques, with 42 patent families in scope — a notably thin cluster given that thin-film deposition uniformity and interfacial quality are among the primary determinants of perovskite device lifetime. Atomic layer deposition, sputtering, and chemical vapor deposition of encapsulant or charge-transport layers are technically relevant entry points. The sparse filing density in this branch, combined with the high citation count of vapor-deposition methods among the top-cited patents, suggests that process-level claims in coating and deposition remain an under-filed area with plausible commercial value.
Search this in Eureka →How leading applicants differ by technology sub-class emphasis
Route coverage across the main technology branches in the current evidence set.
| Player | H10K 30 · Organic semiconductors (OLED etc.) | H10K 71 · Organic semiconductors (OLED etc.) | H10K 85 · Organic semiconductors (OLED etc.) | H01L 31 · Semiconductor devices | H10K 39 · Organic semiconductors (OLED etc.) |
|---|---|---|---|---|---|
| Trina Solar Co Ltd | Strong · 97 | Strong · 83 | Moderate · 41 | Absent | Moderate · 23 |
| Contemporary Amperex Technology Co Ltd | Strong · 85 | Moderate · 39 | Strong · 50 | Emerging · 16 | Emerging · 3 |
| Huaneng Clean Energy Research Institute Co Ltd | Strong · 50 | Strong · 41 | Strong · 31 | Absent | Emerging · 3 |
| Chint New Energy Technology Co Ltd | Strong · 37 | Strong · 27 | Strong · 23 | Absent | Absent |
| Wuxi Utmost Light Technology Co Ltd | Strong · 38 | Strong · 31 | Absent | Absent | Absent |
| Northwestern Polytechnical University | Strong · 28 | Strong · 28 | Absent | Absent | Absent |
| Hanwha Solutions Corporation | Strong · 26 | Absent | Strong · 17 | Absent | Absent |
Frequently asked questions
The corpus covers 2,237 patent families. Filing activity was minimal through 2020 but accelerated sharply from 2021, with 695 families recorded in 2024 alone. The most recent data points are subject to publication lag and likely undercount actual activity.
Trina Solar Co Ltd is the top-ranked applicant with 99 patent families, followed by Contemporary Amperex Technology Co Ltd with 66 and Huaneng Clean Energy Research Institute with 53.
The lifecycle assessment classifies the field as Growth, with annual filings still rising and no evidence of easing from the 2024 peak. The evidence-based growth figure across the measured window is approximately 1,362%. The 2025 and 2026 data points are understated by publication lag and do not indicate a genuine slowdown.
China is by far the dominant filing jurisdiction, followed at a significant distance by the United States, Europe (EPO), and WIPO PCT. South Korea and India are secondary markets. Japan, Canada, and most European national offices have minimal recorded coverage.
The most-cited patent in the corpus relates to a chemical vapor deposition preparation method for perovskite solar cells (69 citations), followed by a planar heterojunction perovskite solar cell and its preparation method (54 citations), and a monolithic tandem chalcopyrite-perovskite photovoltaic work (43 citations).
The most notable under-served adjacent branches relative to the dominant H10K device-architecture cluster are C07F (organometallic and non-carbon compounds, 106 families), C07D (heterocyclic compounds, 96 families), C23C (coating and surface deposition, 42 families), and C01G (compounds of other metals, 57 families). These branches have plausible technical relevance to perovskite stability but materially lower filing density than the core device-architecture area.
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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.
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