https://scholars.lib.ntu.edu.tw/handle/123456789/629980
標題: | Unravelling the Interfacial Dynamics of Bandgap Funneling in Bismuth-Based Halide Perovskites | 作者: | Tang, Yunqi Mak, Chun Hong Zhang, Jun Jia, Guohua KUAN-CHEN CHENG Song, Haisheng Yuan, Mingjian Zhao, Shijun Kai, Ji-Jung Colmenares, Juan Carlos Hsu, Hsien-Yi |
關鍵字: | interfacial dynamics; lead-free halide perovskites; photoelectrocatalysis | 公開日期: | 一月-2023 | 出版社: | WILEY-V C H VERLAG GMBH | 卷: | 35 | 期: | 2 | 來源出版物: | Advanced materials (Deerfield Beach, Fla.) | 摘要: | An environmentally friendly mixed-halide perovskite MA3 Bi2 Cl9- x Ix with a bandgap funnel structure has been developed. However, the dynamic interfacial interactions of bandgap funneling in MA3 Bi2 Cl9- x Ix perovskites in the photoelectrochemical (PEC) system remain ambiguous. In light of this, single- and mixed-halide lead-free bismuth-based hybrid perovskites-MA3 Bi2 Cl9- y Iy and MA3 Bi2 I9 (named MBCl-I and MBI)-in the presence and absence of the bandgap funnel structure, respectively, are prepared. Using temperature-dependent transient photoluminescence and electrochemical voltammetric techniques, the photophysical and (photo)electrochemical phenomena of solid-solid and solid-liquid interfaces for MBCl-I and MBI halide perovskites are therefore confirmed. Concerning the mixed-halide hybrid perovskites MBCl-I with a bandgap funnel structure, stronger electronic coupling arising from an enhanced overlap of electronic wavefunctions results in more efficient exciton transport. Besides, MBCl-I's effective diffusion coefficient and electron-transfer rate demonstrate efficient heterogeneous charge transfer at the solid-liquid interface, generating improved photoelectrochemical hydrogen production. Consequently, this combination of photophysical and electrochemical techniques opens up an avenue to explore the intrinsic and interfacial properties of semiconductor materials for elucidating the correlation between material characterization and device performance. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/629980 | ISSN: | 0935-9648 | DOI: | 10.1002/adma.202207835 |
顯示於: | 生物科技研究所 |
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