Perovskite Stability & Durability Patent Landscape 2026
The perovskite stability and durability patent space is in a Growth phase, with the field still expanding on a multi-year basis—though annual volume has eased from its 2023 peak—and is lightly concentrated, with the top five filers holding 22% of the largest hundred filers’ combined output. Chinese and Hong Kong entities dominate the leading positions, with academic-industry collaboration playing a visible role in shaping the competitive structure.
A fragmented field led by industry-academia hybrids, with no single entity commanding a dominant share
Contemporary Amperex Technology (Hong Kong) Limited leads the ranking with 13 patent families, followed closely by City University of Hong Kong with 12. The gap between first and second place is narrow, signalling that no incumbent has yet locked in a commanding position.
The top five filers account for 22% of the hundred largest filers’ combined total—a relatively low concentration figure that reflects broad participation across industry players, universities, and research institutes. The field has not yet consolidated around a small number of dominant portfolios.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | Contemporary Amperex Technology (Hong Kong) Limited | 13 | |
| 2 | City University of Hong Kong | 12 | |
| 3 | Caelux Corp | 7 | |
| 4 | National Institute of Advanced Industrial Science and Technology (AIST) | 6 | |
| 5 | Imperial College Innovations Limited | 6 | |
| 6 | Trina Solar Co., Ltd. | 5 | |
| 7 | NANJING UNIV OF AERONAUTICS & ASTRONAUTICS | 5 | |
| 8 | Hangzhou Microquanta Semiconductor Co., Ltd. | 5 | |
| 9 | King Fahd University of Petroleum and Minerals | 5 | |
| 10 | Tianjin University of Technology | 4 |
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 11 | CNBM Research Institute for Advanced Glass Materials | 4 | |
| 12 | Jinko Solar (Haining) Co., Ltd. | 4 | |
| 13 | UNIV OF SCI & TECH OF CHINA | 3 | |
| 14 | National Institute of Technology Patna | 3 | |
| 15 | First Solar, Inc. | 3 | |
| 16 | Xi’an TJ-Solar New Energy Co., Ltd. | 3 | |
| 17 | NANJING UNIV OF POSTS & TELECOMM | 3 | |
| 18 | Alliance for Energy Innovation LLC | 3 | |
| 19 | Shenzhen Guangyin Technology Co., Ltd. | 3 | |
| 20 | Kookmin University Industry-Academia Cooperation Foundation | 2 |
The presence of battery giant Contemporary Amperex Technology alongside solar specialists such as Trina Solar, Jinko Solar, Caelux Corp, and Hangzhou Microquanta Semiconductor underlines that perovskite durability is attracting both established photovoltaic manufacturers and newer commercial ventures. Academic institutions—City University of Hong Kong, Nanjing University of Aeronautics and Astronautics, and King Fahd University of Petroleum and Minerals—also hold meaningful positions, pointing to a field where research pipelines still feed directly into the patent record.
The most recent 18–24 months of data are subject to publication lag and are therefore likely under-counted; the 2025 and 2026 figures should be interpreted as lower bounds. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Rapid multi-year expansion anchored in organic-semiconductor device filings
Two charts together capture the pace and composition of innovation: the annual filing trend reveals how quickly patenting activity has accelerated, while the technology-branch breakdown shows where technical effort is focused.
Annual filing trend
Activity was negligible through 2020, then accelerated sharply from 2021 onward, reaching a recorded peak of 64 filings in 2023. The three-year recent window sits 1,075% above the prior three-year window, confirming strong multi-year growth. The 2024, 2025, and 2026 figures are suppressed by publication lag and should not be read as a genuine decline.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H10K (organic semiconductors, which includes perovskite photovoltaic device architecture) is the overwhelmingly dominant IPC class, reflecting that durability improvements are being claimed primarily at the device level rather than at the materials or process level. Adjacent classes—H01L (semiconductor devices), C07D (heterocyclic compounds), and C07F (organo-metallic and non-carbon compounds)—each carry a smaller share, indicating that molecular and materials-layer approaches remain comparatively under-patented.
↗ 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 | 一种自组装单分子层空穴传输材料及其制备方法和应用 | 19 |
| 2 | Solar cell | 7 |
| 3 | 一种适用于反式钙钛矿太阳能电池NiO<sub>x</sub>层的界面修饰材料 | 6 |
| 4 | Materials and Methods for Hole Transport Layers in… | 6 |
| 5 | 一种A位掺杂的卤化物钙钛矿型太阳能电池及其制备方法 | 5 |
| 6 | 一种具有自组织单分子层空穴传输材料的钙钛矿太阳能电池 | 4 |
| 7 | 空穴传输材料及其制备方法、钙钛矿太阳能电池 | 3 |
| 8 | 基于自组装盘状液晶构建复合界面钝化层的热稳定钙钛矿太阳能电池及其制备方法 | 3 |
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
Four structural observations—maturity, concentration, collaboration, and geography—translate the raw patent data into actionable R&D signals.
Growth stage, easing from 2023 peak
The field is classified as Growth: the recent three-year filing window is 1,075% above the prior window, confirming that multi-year expansion is real. However, annual volume has eased from its 2023 peak of 64 recorded filings. For R&D planners, this signals a field that is past early-stage experimentation but not yet mature enough for routine incremental patenting—claims differentiation is still achievable.
Life-cycle: GrowthLow concentration; leadership is contestable
The top five filers hold only 22% of the hundred largest filers’ combined total, and the gap between first (13 patent families) and second (12 patent families) is a single family. This means no portfolio lock-in has occurred and a focused entrant can realistically reach the top tier within a standard R&D cycle. The wide distribution of filers—spanning three continents—reinforces that the field is still open.
Low concentrationCity University of Hong Kong and Imperial College Innovations drive the most active co-filing pair
The most active co-applicant pairing is City University of Hong Kong and Imperial College Innovations Limited, who have filed 6 joint patent families. A secondary cluster involves Jinko Solar (Haining) co-filing with both Jinko Solar (Shangrao) and Jinko Solar Co. Ltd., reflecting internal portfolio coordination across a manufacturing group. The prominence of cross-institutional academic-industry pairs suggests that technology transfer agreements and joint labs are a viable route into this space for new entrants.
Cross-institutionalChina leads filings; the US and Europe are secondary but strategically important
China is the lead jurisdiction with 103 patent records, followed by the United States with 47 and Europe (EPO) with 24. India has 14 records, reflecting a growing domestic research base. WIPO (PCT) filings total 9, which is relatively low for a field with commercial aspirations—suggesting that many applicants have not yet committed to broad international prosecution strategies. Competitors seeking freedom-to-operate outside China should monitor PCT and EPO filings closely.
China-ledGo 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 |
|---|---|---|
| City University of Hong Kong | Imperial College Innovations Limited | 6 |
| Jinko Solar (Haining) Co., Ltd. | Jinko Solar (Shangrao) Co., Ltd. | 2 |
| Jinko Solar (Haining) Co., Ltd. | Jinko Solar Co., Ltd. | 1 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Contemporary Amperex Technology and City University of Hong Kong lead, both as new entrants to this specific domain
Both top-ranked filers entered the perovskite stability space recently, with no meaningful prior-period baseline, underscoring that this sub-field is attracting established players who are pivoting quickly.
Contemporary Amperex Technology (Hong Kong) Limited
Ranked first with 13 patent families, Contemporary Amperex Technology (Hong Kong) Limited is a new entrant to this domain (trajectory: new entrant). Its technology focus is concentrated on H10K organic-semiconductor device architecture—specifically H10K30 and H10K85 subclasses—with a secondary position in H01L31 semiconductor devices. The involvement of a leading battery manufacturer signals an interest in perovskite durability that likely extends to energy-storage and tandem-cell applications beyond conventional single-junction solar.
families: 13City University of Hong Kong
Ranked second with 12 patent families and also a new entrant by trajectory, City University of Hong Kong brings a strongly academic profile concentrated entirely within H10K (subclasses H10K30, H10K85, and H10K71). Notably, it is the lead partner in the most active co-filing relationship in the corpus—6 joint families with Imperial College Innovations Limited—suggesting that its portfolio has significant international co-development depth that may translate into broader prosecution coverage over time.
families: 12| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Contemporary Amperex Technology Co., Limited (CATL) | 10 | ▲ new entrant |
| City University of Hong Kong | 10 | ▲ new entrant |
| Caelux Corp | 5 | ▲ new entrant |
| Imperial College Innovations Limited | 6 | ▲ new entrant |
| National Institute of Advanced Industrial Science and Technology (AIST) | 6 | ▲ new entrant |
| Hangzhou Microquanta Semiconductor Co., Ltd. | 4 | ▲ new entrant |
| King Fahd University of Petroleum and Minerals | 5 | ▲ new entrant |
| Trina Solar Co., Ltd. | 4 | ▲ new entrant |
Under-served adjacent branches worth monitoring in perovskite durability
Several IPC classes appear in the corpus at low volumes relative to the dominant H10K class. These are observations of relative sparsity; the ones noted below also carry plausible technical rationale and a realistic entry path for teams already active in the space.
C07D & C07F · Heterocyclic and organo-metallic compounds
C07D (heterocyclic compounds) carries 23 patent records and C07F (organo-metallic and non-carbon compounds) carries 14—together representing roughly 11% of the corpus at the record level, compared with H10K’s dominant share. Given that A-site cation engineering and halide-substitution strategies are central to perovskite stability, these molecular classes represent an under-patented layer of the innovation stack. Teams with organic or coordination-chemistry capabilities could establish differentiated positions by claiming specific stabilising ligands or encapsulants at the molecular level, rather than at the device-architecture level where the corpus is already dense.
Search this in Eureka →H01G · Capacitors and energy-storage adjacency
H01G (capacitors) appears 12 times in the corpus—a sparse footprint for a class that intersects with charge-transport, interfacial passivation, and dielectric-layer engineering in perovskite stacks. The presence of Contemporary Amperex Technology (a battery/capacitor-domain incumbent) at the top of the ranking hints that this intersection is commercially relevant. Entry here could focus on dielectric passivation layers or encapsulation architectures that borrow from capacitor manufacturing know-how, areas where crossover IP from adjacent industries is plausible but not yet systematically filed.
Search this in Eureka →Frequently asked questions
The corpus covers 207 patent families in scope across the global filing record.
Contemporary Amperex Technology (Hong Kong) Limited leads with 13 patent families, followed by City University of Hong Kong with 12.
The top five filers account for 22% of the hundred largest filers’ combined total, indicating a relatively fragmented field where leadership is still contestable.
China leads with 103 patent records, followed by the United States with 47 and Europe (EPO) with 24.
The field is classified as Growth. The recent three-year filing window is 1,075% above the prior three-year window on a multi-year basis, though annual volume has eased from its 2023 recorded peak of 64 filings. The most recent years are further understated by publication lag.
H01L (semiconductor devices, 27 records), C07D (heterocyclic compounds, 23 records), and C07F (organo-metallic and non-carbon compounds, 14 records) are the largest adjacent branches relative to the dominant H10K class, and each carries a comparatively sparse filing footprint that may present differentiation opportunities for teams with relevant chemistry or device-engineering expertise.
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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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