| Title | Omnidirectional diffusion of organic amine salts assisted by ordered arrays in porous lead iodide for two-step deposited large-area perovskite solar cells |
| Authors | He, Jiacheng Sheng, Wangping Yang, Jia Zhong, Yang Su, Yang Tan, Licheng Chen, Yiwang |
| Affiliation | Nanchang Univ, Inst Polymers & Energy Chem IPEC, Coll Chem & Chem Engn, 999 Xuefu Ave, Nanchang 330031, Peoples R China Jiangxi Normal Univ, Natl Engn Res Ctr Carbohydrate Synth, Key Lab Fluorine & Silicon Energy Mat & Chem, Minist Educ, 99 Ziyang Ave, Nanchang 330022, Peoples R China Peking Univ, Yangtze Delta Inst Optoelect, Nantong 226010, Peoples R China |
| Keywords | ORGANOMETAL HALIDE PEROVSKITES |
| Issue Date | Jan-2023 |
| Publisher | ENERGY & ENVIRONMENTAL SCIENCE |
| Abstract | The perovskite film prepared by traditional two-step sequential deposition possesses numerous defects and excess lead iodide (PbI2), which is mainly due to the formation of a dense PbI2 layer and the incomplete solid-liquid reaction. It has been shown that the presence of the PbI2 species has some positive effects on the power conversion efficiency (PCE), but the random distribution of excess PbI2 can be detrimental to the device stability. Herein, we demonstrate the feasibility of fabricating a porous PbI2 layer with ordered array structure by integrating a succinamide (SA) additive with a nanoimprinting technology, which can confine the organic amine salts in PbI2 arrays to facilitate the omnidirectional diffusion and realize sufficient conversion to perovskites. Consequently, an unencapsulated device (active area of 0.04 cm(2)) is obtained with 23.56% efficiency and excellent long-term humidity stability (similar to 90% efficiency retention after 1800 h) in ambient air (relative humidity of 50 +/- 5%). Moreover, the fabricated perovskite solar cell (1.01 cm(2)) and module (14.63 cm(2)) achieve impressive efficiencies of 21.57% and 16.42%, respectively. This work paves the way for the expansion of the two-step sequential deposition method from the laboratory to the large-scale fabrication of high-performance perovskite photovoltaic devices. |
| URI | http://hdl.handle.net/20.500.11897/669495 |
| ISSN | 1754-5692 |
| DOI | 10.1039/d2ee03418b |
| Indexed | SCI(E) |
| Appears in Collections: | 待认领 |
