In-situ self-assembly of hole transport monolayer during crystallization for efficient single-crystal perovskite solar cells
Abstract
Abstract Single-crystal perovskite solar cells (SC-PSCs) are emerging as a promising technology owing to their intrinsically low defect densities, long carrier diffusion lengths, and enhanced stability compared to their polycrystalline counterpart. However, their performance has been limited by interface-related losses, particularly at the perovskite/charge transport layer, which hinders effective hole extraction and promotes non-radiative recombination. In this work, we introduce a self-assembled monolayer (SAM) deposition strategy that exploits an asymmetric substrate stack configuration during space-confined inverse temperature crystallization (SC-ITC). This configuration triggers an in-situ migration of SAM molecules from the SAM-coated substrate to the uncoated substrate, resulting in a denser and more homogeneous SAM coating than the conventional spin-coating method can achieve. The improved SAM coverage significantly enhances hole extraction. Consequently, our SC-PSCs achieved power conversion efficiency as high as 24.32%.
Article Details
Authors (14)
Vishal Yeddu
Department of Chemistry, University of Victoria, 3800 Finnerty Road, Victoria, British Columbia V8P 5C2, Canada
Khulud Almasabi
Yafeng Xu
Center of Excellence for Renewable Energy and Storage Technologies, Division of Physical Science and Engineering
Augusto Amaro
Department of Chemistry, University of Victoria, 3800 Finnerty Road, Victoria, British Columbia V8P 5C2, Canada
Shuang Qiu
Sergey Dayneko
Department of Chemistry, University of Victoria, 3800 Finnerty Road, Victoria, British Columbia V8P 5C2, Canada
Dongyang Zhang
Parinaz Moazzezi
Department of Electrical & Computer Engineering, University of Victoria, 3800 Finnerty Road, Victoria, British Columbia V8P 5C2, Canada
Christopher Tremblay
Muhammad Naufal Lintangpradipto
Heather L. Buckley
Omar F. Mohammed
Center of Excellence for Renewable Energy and Storage Technologies, Division of Physical Science and Engineering
Osman M. Bakr
Materials Science & Applied Physics Department, Division of Physical Science and Engineering (PSE)
Makhsud I. Saidaminov
Department of Electrical & Computer Engineering, University of Victoria, 3800 Finnerty Road, Victoria, British Columbia V8P 5C2, Canada