Perovskite Lead Sequestration Patent Snapshot 2026
The perovskite lead sequestration field is in a growth phase, with the top five filers holding half of the hundred largest filers’ combined total and EPFL and CATL emerging as the lead institutions. The field is still expanding on a multi-year basis, though annual volume has eased from its 2023 peak and recent years are further understated by publication lag.
EPFL and CATL lead a nascent, concentrated field
EPFL holds the top position in perovskite lead sequestration, followed closely by Contemporary Amperex Technology (Hong Kong) Limited, with the top five filers accounting for half of the ranked applicants visible in this query’ combined output—an unusually high concentration for a field at this scale.
A clear two-tier structure has emerged: EPFL and CATL are meaningfully ahead of the remaining applicants, each of whom holds two or fewer patent families. The gap between the first and third-ranked filers underlines how few organisations have committed sustained resources to this specific problem.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | EPFL (Ecole Polytechnique Federale de Lausanne) | 7 | |
| 2 | Contemporary Amperex Technology (Hong Kong) Limited | 6 | |
| 3 | Xiamen Shinaxin Technology Co., Ltd. | 2 | |
| 4 | LONGi Green Energy Technology Co., Ltd. | 2 | |
| 5 | Shenzhen Yuguang Energy Technology Co., Ltd. | 2 | |
| 6 | Jiujiang Ruoshuo Optoelectronic Technology Co., Ltd. | 1 | |
| 7 | Graphic Era University | 1 | |
| 8 | Nanjing Tech University | 1 | |
| 9 | The University of Hong Kong | 1 | |
| 10 | Korea Institute of Energy Research (KIER) | 1 |
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 11 | Machiokoshi Energy Co., Ltd. | 1 | |
| 12 | National Institute of Technology Patna | 1 | |
| 13 | Ningbo University | 1 | |
| 14 | Kalinga Institute of Industrial Technology | 1 | |
| 15 | Nanjing Aolian Photoenergy Technology Co., Ltd. | 1 | |
| 16 | Northwestern Polytechnical University | 1 | |
| 17 | University of Porto | 1 | |
| 18 | North China Electric Power University | 1 | |
| 19 | Shanghai Huinasi Optoelectronic Technology Co., Ltd. | 1 | |
| 20 | Tianjin University | 1 |
The positions of EPFL (a leading academic research institution) and CATL (a major battery and energy manufacturer) as co-leaders suggest that the field is being shaped simultaneously by fundamental materials science and by commercial product-safety imperatives—a combination that often accelerates regulatory-driven technology adoption.
Filing counts for the most recent 18–24 months are likely understated due to standard patent publication lag; the apparent plateau should not be interpreted as a slowdown until more complete data are available. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Rapid multi-year growth anchored in organic semiconductor and device IP
The filing trend and technology composition charts together reveal a field that expanded sharply from 2020 onward and is dominated by device-level patent classes, with a secondary cluster of materials-chemistry filings.
Annual filing trend
Activity was negligible before 2020, then accelerated through 2022–2023; the three-year recent window is 250% above the prior three-year window, confirming sustained growth on a multi-year basis. The 2023 year recorded the highest single-year count; 2024–2025 figures are likely understated due to publication lag and should not be read as a decline.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H10K (organic semiconductors and perovskite device structures) is the visible class, reflecting that most lead-sequestration IP is embedded within solar-cell device patents rather than standalone materials or process patents. H01L (semiconductor devices) and B01J (chemical and physical processes) form a secondary tier, while classes covering separation, water treatment, and solar thermal are sparsely represented, indicating potential adjacent territory.
↗ 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 | 钙钛矿量子点纳米晶的制备及其在量子点太阳电池中的应用 | 25 |
| 2 | Perovskite solar cell provided with an adsorbent m… | 10 |
| 3 | Perovskite solar cell provided with an adsorbent m… | 5 |
| 4 | Perovskite solar cell provided with an adsorbent m… | 4 |
| 5 | 设置有用于吸附有毒物质的吸附材料的钙钛矿太阳能电池 | 3 |
| 6 | 一种基于原位聚合的钙钛矿太阳能电池内部封装方法 | 1 |
| 7 | Perovskite solar cell, encapsulation method thereo… | 1 |
| 8 | Perovskite solar cell, preparation method thereof,… | 1 |
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.
Assignee snapshot from the current evidence set
The applicants below are visible in this query result. Because the evidence set is relatively small, read this section as a directional snapshot rather than a full competitive ranking.
EPFL
EPFL holds 7 patent families, the largest portfolio in this corpus. Its technical focus spans B01J (chemical adsorption processes) and H01L (semiconductor device structures), reflecting a materials-science-first approach to immobilising lead within or around perovskite cells. Momentum is flagged as a new entrant in the recent filing window, consistent with a research programme that has only recently converted laboratory findings into patent applications.
families: 7CATL (Contemporary Amperex Technology)
Contemporary Amperex Technology (Hong Kong) Limited holds 6 patent families and concentrates entirely in H10K (organic semiconductor and perovskite device) classes, signalling that its sequestration strategy is integrated into cell architecture and fabrication rather than post-process remediation. Its momentum is also flagged as a new entrant, suggesting rapid portfolio build-up aligned with its broader push into perovskite photovoltaics.
families: 6Frequently asked questions
The current corpus covers 36 patent families. This is a small but fast-growing field; the three-year recent window is 250% above the prior three-year window, and the most recent filing years are understated by publication lag.
EPFL (Ecole Polytechnique Federale de Lausanne) holds the largest portfolio with 7 patent families, ahead of Contemporary Amperex Technology (Hong Kong) Limited with 6 patent families.
The field is designated Growth: the recent three-year filing window sits well above the prior three-year window. Annual volume has eased from its 2023 peak, and the most recent years are further understated by publication lag, so the multi-year expansion remains intact.
China is the leading filing jurisdiction, followed by the United States, the European Patent Office, India, and WIPO PCT. China’s lead reflects both manufacturing concentration and the presence of multiple Chinese university and start-up applicants.
H10K (organic semiconductors and perovskite device structures) is visible, followed by H01L (semiconductor devices) and B01J (chemical and physical processes). Most lead-sequestration IP is embedded within solar-cell device patents rather than standalone materials or environmental-process patents.
No co-applicant filings are recorded in the current corpus. The field may be too early-stage for formal IP-sharing agreements, or joint development may be occurring outside the patent system. New co-applicant filings would be a useful early indicator of consortium activity.
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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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