材料科学
电子传输链
介观物理学
凝聚态物理
电子转移
能量转换效率
光电子学
化学物理
化学工程
化学
物理化学
生物化学
物理
工程类
作者
Jingshan He,Tian Ding,Wenjun Wu
出处
期刊:Solar RRL
[Wiley]
日期:2022-07-28
卷期号:6 (10)
被引量:6
标识
DOI:10.1002/solr.202200226
摘要
For carbon‐based fully printable mesoscopic perovskite solar cells (FP‐PSCs), due to the serious interfacial defects formed in the uncontrollable crystallization process, modifying the interface between perovskite and electron transport layer is an effective way to enhance their photovoltaic performance. Herein, ultrathin ZrO 2 is deposited on the mesoporous TiO 2 surface by using spray pyrolysis, and Zr 4+ intercalates into the TiO 2 surface lattice and works together with Ti 4+ and O 2− ions. Thanks to this surface lattice perturbation of Zr 4+ , the reduction of surface oxygen vacancies of TiO 2 (electron transport layer) decreases the density of defective states at the TiO 2 –perovskite interface inhibiting the Shockley–Read–Hall recombination (nonradiative recombination) in the charge cross‐interface transfer. Furthermore, both the open‐circuit voltage and short‐circuit current density are improved significantly. Based on perovskite Cs 0.05 (FA 0.92 MA 0.08 ) 0.95 Pb(I 0.92 Br 0.08 ) 3 for carbon‐based FP‐PSCs, a high power conversion efficiency of 17.81% is obtained. It provides a novel idea and technology for efficient interfacial modification of the electron transport layer for FP‐PSCs.
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