材料科学
钙钛矿(结构)
结晶度
电极
聚合物
佩多:嘘
图层(电子)
化学工程
单层
碳纤维
烷基
光电子学
纳米技术
复合材料
有机化学
化学
物理化学
复合数
工程类
作者
Xiang Feng,Yueyue Gao,Xiufang Huang,Jiantao Wang,Dong Cheng,Gentian Yue,Furui Tan,Stefaan De Wolf
出处
期刊:Small
[Wiley]
日期:2024-07-10
标识
DOI:10.1002/smll.202403267
摘要
Abstract Carbon‐based perovskite solar cells (PSCs) coupled with solution‐processed hole transport layers (HTLs) have shown potential owing to their combination of low cost and high performance. However, the commonly used poly(3‐hexylthiophene) (P3HT) semicrystalline‐polymer HTL dominantly shows edge‐on molecular orientation, in which the alkyl side chains directly contact the perovskite layer, resulting in an electronically poor contact at the perovskite/P3HT interface. The study adopts a synergetic strategy comprising of additive and solvent engineering to transfer the edge‐on molecular orientation of P3HT HTL into 3D molecular orientation. The target P3HT HTL possesses improved charge transport as well as enhanced moisture‐repelling capability. Moreover, energy level alignment between target P3HT HTL and perovskite layer is realized. As a result, the champion devices with small (0.04 cm 2 ) and larger areas (1 cm 2 ) deliver notable efficiencies of 20.55% and 18.32%, respectively, which are among the highest efficiency of carbon‐electrode PSCs.
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