Design principles for electronic charge transport in solution-processed vertically stacked 2D perovskite quantum wells

Nature Communications
Hsinhan TsaiWanyi Nie

Abstract

State-of-the-art quantum-well-based devices such as photovoltaics, photodetectors, and light-emission devices are enabled by understanding the nature and the exact mechanism of electronic charge transport. Ruddlesden-Popper phase halide perovskites are two-dimensional solution-processed quantum wells and have recently emerged as highly efficient semiconductors for solar cell approaching 14% in power conversion efficiency. However, further improvements will require an understanding of the charge transport mechanisms, which are currently unknown and further complicated by the presence of strongly bound excitons. Here, we unambiguously determine that dominant photocurrent collection is through electric field-assisted electron-hole pair separation and transport across the potential barriers. This is revealed by in-depth device characterization, coupled with comprehensive device modeling, which can self-consistently reproduce our experimental findings. These findings establish the fundamental guidelines for the molecular and device design for layered 2D perovskite-based photovoltaics and optoelectronic devices, and are relevant for other similar quantum-confined systems.

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Citations

Oct 23, 2018·Advanced Materials·Rong YangWei Huang
Jan 31, 2019·ChemSusChem·Carmen Ortiz-CervantesDiego Solis-Ibarra
Jan 28, 2021·ACS Applied Materials & Interfaces·Jiahui HouShikuan Yang
Dec 6, 2020·Nature Nanotechnology·Jean-Christophe BlanconAditya D Mohite
Mar 18, 2021·Reports on Progress in Physics·Ziming ChenHin-Lap Yip
Apr 23, 2019·Nano Letters·Kwang Jae LeeOsman M Bakr
Feb 27, 2019·The Journal of Physical Chemistry Letters·Lingfeng ChaoWei Huang
Dec 25, 2019·The Journal of Physical Chemistry Letters·Ankur SolankiTze Chien Sum
Sep 20, 2019·The Journal of Physical Chemistry Letters·Kaibo Zheng, Tönu Pullerits
Mar 12, 2020·ACS Applied Materials & Interfaces·Nourdine Zibouche, M Saiful Islam
Mar 12, 2020·The Journal of Physical Chemistry Letters·Junsang ChoPrashant V Kamat
Nov 5, 2020·Journal of the American Chemical Society·Jun XiZhaoxin Wu
Jan 28, 2020·ACS Applied Materials & Interfaces·Yuanzhi WeiJizheng Wang
Nov 16, 2021·The Journal of Physical Chemistry Letters·Marc DessimozMohammad Khaja Nazeeruddin
Nov 6, 2021·Chemistry, an Asian Journal·Avija AjayakumarChakkooth Vijayakumar
Oct 23, 2021·Advanced Materials·Linfang YanYanlin Song

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Methods Mentioned

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