TY - JOUR
T1 - Improvement in the Performance of Inverted 3D/2D Perovskite Solar Cells by Ambient Exposure
AU - Wang, Yantao
AU - Lin, Jingyang
AU - He, Yanling
AU - Zhang, Yi
AU - Liang, Qiong
AU - Liu, Fangzhou
AU - Zhou, Zhiwei
AU - Chan, Christopher C.S.
AU - Li, Gang
AU - Feng, Shien Ping
AU - Ng, Alan Man Ching
AU - Wong, Kam Sing
AU - Popović, Jasminka
AU - Djurišić, Aleksandra B.
N1 - Funding Information:
This work is supported by RGC CRF grant C5037-18G and C7018-20G, Seed Funding for Strategic Interdisciplinary Research Scheme of the University of Hong Kong and Shenzhen Science and Technology Commission Projects No. JCYJ20170818141216288 and JCYJ20200109105003940. Support from project PZS-2019-02-2068 financed by the “Research Cooperability” Program of the Croatian Science Foundation funded by the European Union from the European Social Fund under the Operational Programme Efficient Human Resources 2014-2020 is also acknowledged. The authors thank Dr. S. Ruan for FTIR measurement.
Funding Information:
This work is supported by RGC CRF grant C5037‐18G and C7018‐20G, Seed Funding for Strategic Interdisciplinary Research Scheme of the University of Hong Kong and Shenzhen Science and Technology Commission Projects No. JCYJ20170818141216288 and JCYJ20200109105003940. Support from project PZS‐2019‐02‐2068 financed by the “Research Cooperability” Program of the Croatian Science Foundation funded by the European Union from the European Social Fund under the Operational Programme Efficient Human Resources 2014‐2020 is also acknowledged. The authors thank Dr. S. Ruan for FTIR measurement.
Publisher Copyright:
© 2022 Wiley-VCH GmbH.
(PGMS checked: P0013979, P0030027, P0030028, P0031666)
PY - 2022/7
Y1 - 2022/7
N2 - Perovskite solar cells (PSCs) are known to be sensitive to the exposure to ambient humidity, which typically results in the degradation and deterioration of performance, although positive effects of exposure to moisture have also been reported, due to recrystallization of the perovskite. Common approach to improve stability is to use 3D/2D perovskite active layer, where 2D capping layer is prepared by spin coating the bulky organic cation halide. Herein, it is shown that optimizing the exposure of the capping layer prepared by spin coating phenylethylammonium iodide (PEAI) to ambient atmosphere results in substantial improvement of the PSC performance. Furthermore, the initial effects of PEAI treatment are dependent on the NiOx/perovskite interface, but in all cases except at very high humidity (80–85% RH) optimized exposure to ambient results in improved performance. The variations in device performance with PEAI treatment and ambient exposure can be attributed to defect passivation and changes in the charge extraction due to energy-level alignment at the interfaces. The best performing devices have passivation of NiOx/perovskite interface and PEAI treatment of top surface followed by exposure to ambient atmosphere at RH of 40–45%, which results in the power conversion efficiency increase from 20.3% to 22.4%.
AB - Perovskite solar cells (PSCs) are known to be sensitive to the exposure to ambient humidity, which typically results in the degradation and deterioration of performance, although positive effects of exposure to moisture have also been reported, due to recrystallization of the perovskite. Common approach to improve stability is to use 3D/2D perovskite active layer, where 2D capping layer is prepared by spin coating the bulky organic cation halide. Herein, it is shown that optimizing the exposure of the capping layer prepared by spin coating phenylethylammonium iodide (PEAI) to ambient atmosphere results in substantial improvement of the PSC performance. Furthermore, the initial effects of PEAI treatment are dependent on the NiOx/perovskite interface, but in all cases except at very high humidity (80–85% RH) optimized exposure to ambient results in improved performance. The variations in device performance with PEAI treatment and ambient exposure can be attributed to defect passivation and changes in the charge extraction due to energy-level alignment at the interfaces. The best performing devices have passivation of NiOx/perovskite interface and PEAI treatment of top surface followed by exposure to ambient atmosphere at RH of 40–45%, which results in the power conversion efficiency increase from 20.3% to 22.4%.
KW - 3D/2D perovskites
KW - ambient exposure
KW - interfacial passivation
KW - perovskite solar cells
KW - phenylethylammonium iodide (PEAI) modification
UR - http://www.scopus.com/inward/record.url?scp=85128268175&partnerID=8YFLogxK
U2 - 10.1002/solr.202200224
DO - 10.1002/solr.202200224
M3 - Journal article
AN - SCOPUS:85128268175
SN - 2367-198X
VL - 6
SP - 1
EP - 12
JO - Solar RRL
JF - Solar RRL
IS - 7
M1 - 2200224
ER -