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Fast and Balanced Charge Transport Enabled by Solution‐Processed Metal Oxide Layers for Efficient and Stable Inverted Perovskite Solar Cells
,
James Mcgettrick,
Kangyu Ji,
Jinxin Bi,
Thomas Webb,
Xueping Liu ,
Dongtao Liu,
Aobo Ren,
Yuren Xiang,
Bowei Li,
Vlad Stolojan,
Trystan Watson ,
Samuel D. Stranks,
Wei Zhang
ENERGY & ENVIRONMENTAL MATERIALS
Swansea University Author:
Trystan Watson
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DOI (Published version): 10.1002/eem2.12595
Abstract
Metal oxide charge transport materials are preferable for realizing long-term stable and potentially low-cost perovskite solar cells (PSCs). However, due to some technical difficulties (e.g., intricate fabrication protocols, high-temperature heating process, incompatible solvents, etc.), it is still...
| Published in: | ENERGY & ENVIRONMENTAL MATERIALS |
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| ISSN: | 2575-0356 2575-0356 |
| Published: |
Wiley
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| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa63219 |
| Abstract: |
Metal oxide charge transport materials are preferable for realizing long-term stable and potentially low-cost perovskite solar cells (PSCs). However, due to some technical difficulties (e.g., intricate fabrication protocols, high-temperature heating process, incompatible solvents, etc.), it is still challenging to achieve efficient and reliable all-metal-oxide-based devices. Here, we developed efficient inverted PSCs (IPSCs) based on solution-processed nickel oxide (NiOx) and tin oxide (SnO2) nanoparticles, working as hole and electron transport materials respectively, enabling a fast and balanced charge transfer for photogenerated charge carriers. Through further understanding and optimizing the perovskite/metal oxide interfaces, we have realized an outstanding power conversion efficiency (PCE) of 23.5% (the bandgap of the perovskite is 1.62 eV), which is the highest efficiency among IPSCs based on all-metal-oxide charge transport materials. Thanks to these stable metal oxides and improved interface properties, ambient stability (retaining 95% of initial PCE after 1 month), thermal stability (retaining 80% of initial PCE after 2 weeks) and light stability (retaining 90% of initial PCE after 1000 hours aging) of resultant devices are enhanced significantly. In addition, owing to the low-temperature fabrication procedures of the entire device, we have obtained a PCE of over 21% for flexible IPSCs with enhanced operational stability. |
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| Keywords: |
fast and balanced charge transfer, inverted perovskite solar cells, long-term stability, low-temperature processing, metal oxides. |
| College: |
Faculty of Science and Engineering |
| Funders: |
EPSRC,
H2020,
Newton,
RS and Tata |