Oligomeric silica-wrapped perovskites enable synchronous defect passivation and grain stabilization for efficient and stable perovskite photovoltaics
Article
Article Title | Oligomeric silica-wrapped perovskites enable synchronous defect passivation and grain stabilization for efficient and stable perovskite photovoltaics |
---|---|
ERA Journal ID | 211587 |
Article Category | Article |
Authors | Bai, Yang (Author), Lin, Yun (Author), Ren, Long (Author), Shi, Xiaolei (Author), Strounina, Ekaterina (Author), Deng, Yehao (Author), Wang, Qi (Author), Fang, Yanjun (Author), Zheng, Xiaopeng (Author), Lin, Yuze (Author), Chen, Zhi-Gang (Author), Du, Yi (Author), Wang, Lianzhou (Author) and Huang, Jinsong (Author) |
Journal Title | ACS Energy Letters |
Journal Citation | 4 (6), pp. 1231-1240 |
Number of Pages | 10 |
Year | 2019 |
Publisher | American Chemical Society |
Place of Publication | Washingtom, United States |
ISSN | 2380-8195 |
Digital Object Identifier (DOI) | https://doi.org/10.1021/acsenergylett.9b00608 |
Abstract | The intrinsic instability of hybrid perovskite materials induced by defect states arises as one major challenge hampering the commercialization of perovskite solar cells (PSCs). Here, we report a facile strategy of wrapping perovskite grains within an oligomeric silica (OS) matrix in a core−shell geometry, which can synchronously passivate the defects at surfaces and grain boundaries and stabilize the grains at the nanoscale. We observe a significant reduction of trap density and elongation of carrier lifetime in OS-wrapped perovskites, which yields an increased efficiency of 21.5% for p−i−n structured PSCs with a decent open-circuit voltage of 1.15 V and a fill factor of 0.81. This all-around nanoscale grain wrapping leads to remarkable improvement of the operational stability of PSCs, sustaining 80% of the efficiency after “burn-in” under full sunlight with UV for more than 5200 h. Our findings provide a new pathway towards efficient and stable PSCs. |
Keywords | perovskite, solar cells, methylammonium lead |
ANZSRC Field of Research 2020 | 401605. Functional materials |
Public Notes | © 2019 American Chemical Society. |
Byline Affiliations | University of Nebraska-Lincoln, United States |
University of Wollongong | |
University of Queensland | |
Centre for Future Materials | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q5955/oligomeric-silica-wrapped-perovskites-enable-synchronous-defect-passivation-and-grain-stabilization-for-efficient-and-stable-perovskite-photovoltaics
125
total views10
total downloads0
views this month0
downloads this month