연구
Research Outcome
미래를 창조하는 포스텍 화학공학과
Alkyl Additive-Mediated Growth of Two-Dimensional Tin Halide Perovskites for Efficient Charge Transport
- Title of paper
- Alkyl Additive-Mediated Growth of Two-Dimensional Tin Halide Perovskites for Efficient Charge Transport
- Author
- [노용영교수 연구실] 효율적인 전하 수송을 위한 알킬 첨가제 기반 이차원 주석 할라이드 페로브스카이트 박막성장 연구
- Publication in journal
- Small Struct. 2500285 (2025)
- Publication date
- 20250717
[Abstract]
Solution-processed two-dimensional (2D) tin (Sn2+)-halide perovskites have achieved great milestones in (opto)electronic devices. The fabrication of high-quality 2D Sn2+-halide perovskite films has remained a difficult challenge due to the Lewis acidity of Sn2+ and its rapid crystallization. Herein, incorporating an alkyl additive, 1,8-diiodooctane (DIO), to mediate growth of 2D Sn2+-halide perovskites by chelating with tin-iodide [SnI6]4− inorganic octahedral cage at the intermediate iodide vacancies is suggested. The chelation of DIO and 2D Sn2+-halide perovskites promotes deceleration of film crystallization, producing high-quality films with homogeneous connection of lattice aligned parallel to the substrates. The optimized DIO-incorporated 2D Sn2+-halide perovskite transistors and phototransistors demonstrate more than twofolds the field-effect mobility compared to pristine devices, enhanced operational stability, and optoelectronic conversion ability. The incorporation of DIO facilitates the optimal growth of homogeneous 2D Sn2+-halide perovskite films for emerging halide perovskite-based (opto)electronics.
LINK: https://onlinelibrary.wiley.com/doi/10.1002/sstr.202500285
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