Unravelling the Interfacial Dynamics of Bandgap Funneling in Bismuth-Based Halide Perovskites

被引:218
作者
Tang, Yunqi [1 ,2 ]
Mak, Chun Hong [1 ,2 ]
Zhang, Jun [3 ]
Jia, Guohua [4 ]
Cheng, Kuan-Chen [5 ,6 ,7 ,8 ]
Song, Haisheng [9 ,10 ]
Yuan, Mingjian [11 ]
Zhao, Shijun [3 ]
Kai, Ji-Jung [3 ]
Colmenares, Juan Carlos [12 ]
Hsu, Hsien-Yi [1 ,2 ]
机构
[1] City Univ Hong Kong, Sch Energy & Environm, Dept Mat Sci & Engn, Kowloon Tong, Hong Kong, Peoples R China
[2] City Univ Hong Kong, Shenzhen Res Inst, Shenzhen 518057, Peoples R China
[3] City Univ Hong Kong, Dept Mech Engn, Kowloon Tong, Hong Kong, Peoples R China
[4] Curtin Univ, Sch Mol & Life Sci, Curtin Inst Funct Mol & Interfaces, GPO Box U1987, Perth, WA 6845, Australia
[5] Natl Taiwan Univ, Grad Inst Food Sci Technol, Taipei 10617, Taiwan
[6] Natl Taiwan Univ, Inst Biotechnol, Taipei 10617, Taiwan
[7] Asia Univ, Dept Optometry, 500 Lioufeng Rd, Taichung 41354, Taiwan
[8] China Med Univ, China Med Univ Hosp, Dept Med Res, Taichung, Taiwan
[9] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect WNLO, 1037 Luoyu Rd, Wuhan 430074, Hubei, Peoples R China
[10] Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, 1037 Luoyu Rd, Wuhan 430074, Hubei, Peoples R China
[11] Nankai Univ, Coll Chem, Renewable Energy Convers & Storage Ctr RECAST, Key Lab Adv Energy Mat Chem,Minist Educ, Tianjin 300071, Peoples R China
[12] Polish Acad Sci, Inst Phys Chem, PL-01224 Warsaw, Poland
基金
澳大利亚研究理事会; 中国国家自然科学基金;
关键词
interfacial dynamics; lead-free halide perovskites; photoelectrocatalysis; TRANSFER RATE CONSTANTS; CHARGE-TRANSFER; SOLAR; HYDROGEN; EFFICIENCY; CARBON; ELECTRODEPOSITION; DIFFUSION; TRANSPORT; REDUCTION;
D O I
10.1002/adma.202207835
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
An environmentally friendly mixed-halide perovskite MA(3)Bi(2)Cl(9-)(x)I(x) with a bandgap funnel structure has been developed. However, the dynamic interfacial interactions of bandgap funneling in MA(3)Bi(2)Cl(9-)(x)I(x) perovskites in the photoelectrochemical (PEC) system remain ambiguous. In light of this, single- and mixed-halide lead-free bismuth-based hybrid perovskites-MA(3)Bi(2)Cl(9-)(y)I(y) and MA(3)Bi(2)I(9) (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.
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页数:10
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