TY - JOUR
T1 - Favorable morphology and compositional distribution enable efficient and stable quasi-2D Dion-Jacobson perovskite solar cells
AU - Zhou, Chao
AU - Han, Yonglei
AU - Cheng, Lei
AU - Ma, Ruijie
AU - Wang, Fei
AU - Weng, Shuchen
AU - Yu, Guicheng
AU - Lin, Fang
AU - Zhou, Kang
AU - Hu, Hanlin
AU - Liang, Xiao
AU - Wang, Yongfei
AU - Lin, Haoran
AU - Li, Gang
N1 - Funding Information:
We thank the National Natural Science Foundation of China (22005202) and Scientific Research Startup Fund for Shenzhen High-Caliber Personnel of SZPT (6022310054k) for financial support.
Publisher Copyright:
© 2023 The Royal Society of Chemistry
PY - 2023/4/27
Y1 - 2023/4/27
N2 - Two-dimensional (2D) Dion-Jacobson (DJ) halide perovskites are being intensively investigated owing to their superior stability compared with 2D Ruddlesden-Popper (RP) perovskites. Although various organic cations have been reported to form 2D DJ perovskites, their structure-property relationships are rarely studied. In this work, two novel organic cations MDAN (4,4′-methylenedianilinium) and EDAN (4,4′-ethylenedianilinium) were applied to form quasi-2D DJ perovskites with nominal layer number n = 6. An (EDAN)MA5Pb6I19:0.15MACl based inverted solar cell achieved a power conversion efficiency (PCE) of 13.2%, outperforms the 9.6% PCE achieved by a (MDAN)MA5Pb6I19:0.15MACl based device. The formation of quasi-2D perovskites with high-n values was observed for both compounds, while the superior performance is demonstrated by the (EDAN)MA5Pb6I19:0.15MACl based device, which could be attributed to its better film morphology and lower defect density. Intriguingly, we found that EDAN based quasi-2D perovskites were evenly distributed in the film while MDAN based quasi-2D perovskites concentrated near the film surface, accounting for an unfavorable electronic band alignment of the latter. Both (MDAN/EDAN)MA5Pb6I19:0.15MACl films remained unchanged in air with 50% relative humidity for 20 days. This work not only presents a decent device performance, but also explores understanding of tuning morphology towards high-efficiency quasi-2D Dion-Jacobson perovskite solar cells.
AB - Two-dimensional (2D) Dion-Jacobson (DJ) halide perovskites are being intensively investigated owing to their superior stability compared with 2D Ruddlesden-Popper (RP) perovskites. Although various organic cations have been reported to form 2D DJ perovskites, their structure-property relationships are rarely studied. In this work, two novel organic cations MDAN (4,4′-methylenedianilinium) and EDAN (4,4′-ethylenedianilinium) were applied to form quasi-2D DJ perovskites with nominal layer number n = 6. An (EDAN)MA5Pb6I19:0.15MACl based inverted solar cell achieved a power conversion efficiency (PCE) of 13.2%, outperforms the 9.6% PCE achieved by a (MDAN)MA5Pb6I19:0.15MACl based device. The formation of quasi-2D perovskites with high-n values was observed for both compounds, while the superior performance is demonstrated by the (EDAN)MA5Pb6I19:0.15MACl based device, which could be attributed to its better film morphology and lower defect density. Intriguingly, we found that EDAN based quasi-2D perovskites were evenly distributed in the film while MDAN based quasi-2D perovskites concentrated near the film surface, accounting for an unfavorable electronic band alignment of the latter. Both (MDAN/EDAN)MA5Pb6I19:0.15MACl films remained unchanged in air with 50% relative humidity for 20 days. This work not only presents a decent device performance, but also explores understanding of tuning morphology towards high-efficiency quasi-2D Dion-Jacobson perovskite solar cells.
UR - http://www.scopus.com/inward/record.url?scp=85159720264&partnerID=8YFLogxK
U2 - 10.1039/d2ta09940c
DO - 10.1039/d2ta09940c
M3 - Journal article
AN - SCOPUS:85159720264
SN - 2050-7488
VL - 11
SP - 11377
EP - 11387
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 21
ER -