DataVXThe Journal of Physical Chemistry CPaper
journal article·2020-07-30

Passivating Charged Defects with 1,6-Hexamethylenediamine To Realize Efficient and Stable Tin-Based Perovskite Solar Cells

Ben Ma, Junwen Chen, Minghao Wang, Xin Xu, Jie Qian, Yao Lu, Wenzhu Zhang, Pengfei Xia, Minchao Qin, Wenjing Zhu, Liuquan Zhang, Shufen Chen, Xinhui Lu, Wei Huang

The Journal of Physical Chemistry C· Volume 124· Issue 30
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Source abstract

Abstract

An organic cationic salt, hexamethylenediamine diiodide (HDADI), is introduced into formamidinium tin iodide (FASnI 3 ) perovskite solar cells (PSCs) by consideration of amino group passivation of HDA 2+ to iodide of SnI 6 4– and assisted links of amino groups at both ends of HDA 2+ to the perovskite unit cell to form the Dion–Jacobson (DJ) layered two-dimensional (2D) perovskite. X-ray diffraction and grazing-incidence wide-angle X-ray scattering characteristics exclude the formation of the DJ layered 2D perovskite. A decent power conversion efficiency (PCE) and stability are derived from the high-quality perovskite films with large coverage, high crystallinity, and disappeared pinholes as well as increased radiative recombination and a prolonged carrier lifetime, which are associated with the interaction of NH 3 + and SnI 6 4– octahedra via a hydrogen bond. The interaction not only neutralizes charged defects or dangling bonds of perovskites but also forms a shield to retard the oxidation of Sn 2+ to Sn 4+ and reduce Sn vacancies. Applications of the HDADI-treated FASnI 3 films into PSCs acquire a champion PCE of 7.6% and an outstanding long-term stability of over 550 h to retain 80% of the initial efficiency in a glovebox with a N 2 environment. This work may guide the design of highly stable and efficient Sn-based PSCs.
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

Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications (NUPT), 9 Wenyuan Road, Nanjing 210023, China

Department of Physics, Chinese University of Hong Kong, New Territories, Kowloon 999077, Hong Kong, China

Frontiers Science Center for Flexible Electronics (FSCFE), Xi’an Institute of Flexible Electronics (IFE) & Xi’an Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi’an 710072, China

Funding

Research Grants Council, University Grants Committee · Ministry of Science and Technology of the People's Republic of China · Natural Science Foundation of Jiangsu Province · National Natural Science Foundation of China · Chinese University of Hong Kong · Priority Academic Program Development of Jiangsu Higher Education Institutions · Synergetic Innovation Center for Organic Electronics and Information Displays

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