DataVXACS Applied Energy MaterialsPaper
journal article·2024-10-14

Multifunctional Guanidine Ionic Liquid with Lactate Anion-Assisted Crystallization and Defect Passivation for High-Efficient and Stable Perovskite Solar Cells

Aamir Saeed, Liang Wang, Zhaoyang Chen, Junhui Fang, Lin Yuan, Shuai Wang, Iqbal Hussain, Jianwei Zhao, Qingqing Miao

ACS Applied Energy Materials· Volume 7· Issue 19
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Source abstract

Abstract

Perovskite solar cells (PSCs) are receiving tremendous attention among other photovoltaic devices for their high power conversion efficiency (PCE), facile fabrication technique, eco-friendliness, and low cost. Unfortunately, the intrinsic defects and the quality of the perovskite films arising from the halide ion migration and undercoordinated Pb 2+ are still considered to be the bottleneck for long-term operational stability. Herein, the introduction of task-specific ionic liquid (IL) tetramethylguanidine lactate (GuLAC) demonstrates excellent defect passivation effects and crystal growth. More specifically, the formation of hydrogen bonds between –NH 2 in GA + and I – passivates cation defects, while strong chemical interaction of lactate anion passivates the undercoordinated Pb 2+ . Both experimental observations and theoretical simulation confirm the strong interaction of GuLAC with the perovskite, which is responsible for restricting ion migration, improving grains’ size, and elongating the carrier lifetime. As a result, the IL-modified device exhibits improved PCE and superior long-term stability compared to the control device. The incorporation of IL additives proves to be a viable approach for achieving both high PCE and stable PSC devices.
Source: openalex_inverted_index · Quality: baseline

Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Quantum Dots Synthesis And Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P. R. China

University of Chinese Academy of Sciences, Beijing 100049, China

Info-Powered Energy System Research Center (i-PERC), The University of Electro-Communications, Tokyo 182-8585, Japan

Longzihu New Energy Laboratory, Zhengzhou Institute of Emerging Industrial Technology, Henan University, Zhengzhou 450000, P. R. China

Shenzhen Huasuan Technology Co. Ltd, Shenzhen 518055, P. R. China

Langfang Technological Centre of Green Industry, Langfang 065001, P. R. China

Funding

Natural Science Foundation of Hebei Province · Youth Innovation Promotion Association of the Chinese Academy of Sciences · National Natural Science Foundation of China · The World Academy of Sciences · Alliance of International Science Organizations · Science Fund for Distinguished Young Scholars of Hebei Province · Chinese Academy of Sciences · Zhongke Technology Achievement Transfer and Transformation Center of Henan Province

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