材料科学
佩多:嘘
图层(电子)
有机太阳能电池
电子迁移率
能量转换效率
光电子学
活动层
透射率
化学工程
纳米技术
聚合物
复合材料
薄膜晶体管
工程类
作者
Jixi Zeng,Xi Fan,Jinzhao Wang,Jia Li,Jiwen Chen,Kwun Nam Hui,Ling Ai,Junfeng Fang,Weijie Song
标识
DOI:10.1002/adom.202302947
摘要
Abstract Binary organic solar cells (OSCs) having a controllable phase‐separated morphology of active layers and simple solution manufacturing are desirable for organic photovoltaic adaptation. However, low hole mobility and an unbalanced hole‐ and electron transport reduce the power conversion efficiency (PCE) of the OSCs. Here, a highly efficient binary OSC with a poly(3,4‐ethylenedioxythiophene):poly(4‐styrenesulfonate) (PEDOT:PSS) buffer layer as a hole transport layer (HTL) via using a water‐soluble sulfonate to wrap the PEDOT:PSS core‐shell structures in solutions is reported. The PEDOT 1 :PSS 2.80 buffer layers have good merits including i) a smooth, homogeneous, and hydrophilic surface for an intimate contact, ii) a high work function and raised surface potentials with much uniform distributions for an energy band alignment, and iii) a high optical transmittance in the broad spectral region from 400 to 1100 nm along with an improved electrical conductivity. Benefiting from a raised hole mobility and a better charge‐mobility balance, the solution‐processed binary OSCs yielded a high PCE of 18.62%. 18.62% is one of the highest values among these binary OSCs based on the PEDOT:PSS HTLs and PM6:L8‐BO active layers. The PEDOT 1 :PSS 2.80 buffer layers are superior to the pristine PEDOT 1 :PSS 2.60 buffer layers in terms of raising the OSC efficiency.
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