材料科学
介观物理学
导线
介孔材料
钙钛矿(结构)
兴奋剂
工作职能
能量转换效率
光电子学
载流子
纳米技术
凝聚态物理
化学工程
复合材料
催化作用
物理
图层(电子)
化学
工程类
生物化学
作者
Jiankang Du,Cheng Qiu,Sheng Li,Wenhao Zhang,Weihua Zhang,Yifan Wang,Zexiong Qiu,Qifei Wang,Kai Yang,Anyi Mei,Yaoguang Rong,Yue Hu,Hongwei Han
标识
DOI:10.1002/aenm.202102229
摘要
Abstract The hole‐conductor‐free printable mesoscopic perovskite solar cells based on the inorganic scaffolds of mesoporous titania, mesoporous zirconia, and porous carbon have attracted much attention due to their excellent stability and low manufacturing cost. However, in such hole‐conductor‐free devices, the transport of the photogenerated holes is dominated by the diffusion‐assisted charge carrier movement, while the driving force is insufficient. Reinforcing the built‐in electric field (BEF) is an effective strategy to promote oriented carrier transport. Herein, by using an optimized two‐step deposition method, the BEF is reinforced by creating a work function difference of perovskite (Δ µ ) in different layers via a gradient self‐doping. The enhanced BEF improves the hole transport and extraction, and significantly reduces the carrier recombination losses in the device. As a result, an average open‐circuit voltage improvement over 60 mV and a power conversion efficiency of 17.68% are achieved without any additives or complex processes. This strategy provides a new approach toward fabricating highly efficient printable mesoscopic perovskite solar cells with reduced carrier recombination losses.
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