Long Zhihang, Tong Xin, Wang Rui, Channa Ali Imran, Li Xin, You Yimin, Xia Li, Cai Mengke, Zhao Hongyang, Wang Zhiming M
Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China.
Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou, 313001, P. R. China.
ChemSusChem. 2022 May 20;15(10):e202200346. doi: 10.1002/cssc.202200346. Epub 2022 Apr 22.
"Green" colloidal quantum dots (QDs)-based photoelectrochemical (PEC) cells are promising solar energy conversion systems possessing environmental friendliness, cost-effectiveness, and highly efficient solar-to-hydrogen conversion. In this work, eco-friendly AgInSe (AISe)/ZnSe core/shell QDs with wurtzite (WZ) phase were synthesized for solar hydrogen production. It was demonstrated that appropriately engineering the ZnSe shell thickness resulted in effective surface defects passivation of the AISe core for suppressed charge recombination in the consequent core/shell AISe/ZnSe QDs. The fabricated environmentally friendly core/shell QDs-based PEC device exhibited improved photo-excited electrons extraction efficiency under optimized conditions and delivered a maximum photocurrent density as high as 7.5 mA cm and long-term durability under standard AM 1.5G illumination (100 mW cm ). These findings suggest that AISe/ZnSe core/shell QDs with tailored optoelectronic properties are potential light sensitizers for eco-friendly, cost-effective, and highly efficient solar energy conversion applications.
基于“绿色”胶体量子点（QDs）的光电化学（PEC）电池是很有前景的太阳能转换系统，具有环境友好、成本效益高以及高效的太阳能到氢能转换等特点。在这项工作中，合成了具有纤锌矿（WZ）相的生态友好型AgInSe（AISe）/ZnSe核壳量子点用于太阳能制氢。结果表明，适当控制ZnSe壳层厚度可有效钝化AISe核的表面缺陷，从而抑制后续核壳结构AISe/ZnSe量子点中的电荷复合。所制备的基于环境友好型核壳量子点的PEC器件在优化条件下表现出提高的光激发电子提取效率，在标准AM 1.5G光照（100 mW/cm²）下可提供高达7.5 mA/cm²的最大光电流密度以及长期稳定性。这些发现表明，具有定制光电特性的AISe/ZnSe核壳量子点是用于环境友好、成本效益高且高效的太阳能转换应用的潜在光敏剂。
