摘要
Conjugated polymers have been explored as promising hole-transporting layer(HTL)in lead sulfide(PbS)quantum dot(QD)solar cells.The fine regulation of the inorganic/organic interface is pivotal to realize high device performance.In this work,we propose using CsPbI_(3) QDs as the interfacial layer between PbS QD active layer and organic polymer HTL.The relative soft perovskite can mediate the interface and form favorable energy level alignment,improving charge extraction and reducing interfacial charge recombination.As a result,the photovoltaic performance can be efficiently improved from 10.50%to 12.32%.This work may provide new guidelines to the device structural design of QD optoelectronics by integrating different solutionprocessed semiconductors.
基金
supported by the National Natural Science Foundation of China(Nos.92163114,22161142003,52002260,62022081,and 61974099)
the Natural Science Foundation of Jiangsu Province of China(No.BK20200872)
the State Key Laboratory of applied optics(No.SKLAO2020001A03)
Postdoctoral Science Foundation of China(No.2021M702415)
This work is also supported by Suzhou Key Laboratory of Functional Nano&Soft Materials,Collaborative Innovation Center of Suzhou Nano Science&Technology,the 111 Project,and Joint International Research Laboratory of Carbon-Based Functional Materials and Devices.K.W.acknowledges the funding support from National Key Research and Development Program(No.2017YFE0120400)
National Natural Science Foundation of China(No.61875082).
