钝化
钙钛矿(结构)
材料科学
吸附
能量转换效率
光伏
化学工程
光伏系统
钙钛矿太阳能电池
无机化学
图层(电子)
纳米技术
化学物理
光电子学
化学
物理化学
生态学
工程类
生物
作者
Ziren Zhou,Hui Jun Lian,Jin Xie,Wen Cheng Qiao,Xinsheng Wu,Yiheng Shi,Xue Lu Wang,Sheng Dai,Haiyang Yuan,Yu Hou,Shuang Yang,Hua Yang
标识
DOI:10.1016/j.xcrp.2022.100760
摘要
Chemical passivation of defective perovskite surface is a fundamental strategy to stabilize solar cell operation by impeding the defect-dominant surface ion migration. Here, we show that the configuration of organic cations plays a key role in determining their surface adsorption energetics at various perovskite facets, which will strongly impact the spatial uniformity of the low-dimensional perovskite passivation layer (LDPL). A weak-anisotropic adsorption behavior is demonstrated for tertiary ammonium that can enable a conformal LDPL on the perovskite grain surface. Benefiting from comprehensive surface passivation, the migration of ionic perovskite species was suppressed and the as-fabricated p-i-n solar cells yielded an optimized power conversion efficiency of 22.6% with an expected T80 lifetime of about 4,000 h under continuous 1-sun illumination. Our findings give insight into the design and preparation of heterostructured perovskite films toward efficient and stable solar cells.
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