Mercapto-functionalized scaffold improves perovskite buried interfaces for tandem photovoltaics

Nature Communications Springer Science and Business Media LLC 16:1 (2025) 4917

Authors:

Jianan Wang, Shuaifeng Hu, He Zhu, Sanwan Liu, Zhongyong Zhang, Rui Chen, Junke Wang, Chenyang Shi, Jiaqi Zhang, Wentao Liu, Xia Lei, Bin Liu, Yongyan Pan, Fumeng Ren, Hasan Raza, Qisen Zhou, Sibo Li, Longbin Qiu, Guanhaojie Zheng, Xiaojun Qin, Zhiguo Zhao, Shuang Yang, Neng Li, Jingbai Li, Atsushi Wakamiya, Zonghao Liu, Henry J Snaith, Wei Chen

Charge Extraction Multilayers Enable Positive-Intrinsic-Negative Perovskite Solar Cells with Carbon Electrodes

ACS Energy Letters American Chemical Society (ACS) (2025) 2736-2742

Authors:

Tino Lukas, Seongrok Seo, Philippe Holzhey, Katherine Stewart, Charlie Henderson, Lukas Wagner, David Beynon, Trystan M Watson, Ji-Seon Kim, Markus Kohlstädt, Henry J Snaith

Influence of Interfacial Reactions on Perovskite Optoelectronic Devices

small methods Wiley (2025) 2500438

Authors:

Zhongcheng Yuan, Sai Bai, Feng Gao, Henry J Snaith

Abstract:

Interfacial materials tend to alter the crystallization, films growth and defect formation process of the as‐deposited perovskites, which has been a critical and fundamental factor in determining the efficiency and operational stability of perovskite‐based optoelectronic devices. This review explores the underlying mechanism of interfacial reactions, which can either result in degradations or be beneficial. The influence of interfacial reactions, mainly interface‐induced deprotonation of organic cations and amidation processes, are discussed in relation to their impact on perovskite film growth and ensuing optoelectronic device performance. It is further proposed strategies to regulate these reactions and mitigate their negative effects to achieve high performance optoelectronic devices.

Unveiling the importance of nondominant facets in (111)-dominated perovskite films

ACS Applied Materials and Interfaces American Chemical Society (2025)

Authors:

Bo Zhou, Pei Zhao, Junxue Guo, Shuaifeng Hu, Xin Guo, Jiewei Liu, Can Li

Abstract:

While (111)-dominated perovskite films hold the potential for high-stability solar cells, most studies have primarily focused on modulating the (111) facets, overlooking the distribution and formation mechanism of the nondominant (100) facets. In this study, we delve into the (111) orientation via solvent regulation and investigate the evolution of facet distribution using various diffraction techniques. The findings reveal that simply stacking (111) facets does not inherently enhance solar cells. Instead, the distribution of nondominant (100) facets in (111)-dominated films significantly influences both photoelectric property and stability. These observations highlight the critical need to manage the interplay between dominant and nondominant facets. The study further offers strategies for addressing facet heterogeneity to achieve a uniform facet distribution. This research provides a comprehensive framework for understanding (111)-dominated perovskites and offers valuable guidance for designing high-performance perovskite solar cells.

Interfacial Energetics Reversal Strategy for Efficient Perovskite Solar Cells.

Advanced materials (Deerfield Beach, Fla.) (2025) e2503110

Authors:

Sheng Jiang, Shaobing Xiong, Zhongcheng Yuan, Yafang Li, Xiaomeng You, Hongbo Wu, Menghui Jia, Zhennan Lin, Zaifei Ma, Yuning Wu, Yefeng Yao, Xianjie Liu, Junhao Chu, Zhenrong Sun, Mats Fahlman, Henry J Snaith, Qinye Bao

Abstract:

Reducing heterointerface nonradiative recombination is a key challenge for realizing highly efficient perovskite solar cells (PSCs). Motivated by this, a facile strategy is developed via interfacial energetics reversal to functionalize perovskite heterointerface. A surfactant molecule, trichloro[3-(pentafluorophenyl)propyl]silane (TPFS) reverses perovskite surface energetics from intrinsic n-type to p-type, evidently demonstrated by ultraviolet and inverse photoelectron spectroscopies. The reconstructed perovskite surface energetics match well with the upper deposited hole transport layer, realizing an exquisite energy level alignment for accelerating hole extraction across the heterointerface. Meanwhile, TPFS further diminishes surface defect density. As a result, this cooperative strategy leads to greatly minimized nonradiative recombination. PSCs achieve an impressive power conversion efficiency of 25.9% with excellent reproducibility, and a nonradiative recombination-induced qVoc loss of only 57 meV, which is the smallest reported to date in n-i-p structured PSCs.