RT Journal Article A1 Rui Wang,Xin Tong,Zhihang Long,Ali Imran Channa,Hongyang Zhao,Xin Li,Mengke Cai,Yimin You,Xuping Sun,Zhiming Wang; AD 基础与前沿科学研究所, 中国 ; 基础与前沿科学研究所, 中国 ; 基础与前沿科学研究所, 中国 ; 基础与前沿科学研究所, 中国 ; 材料科学与工程系, 韩国 ; 基础与前沿科学研究所, 中国 ; 基础与前沿科学研究所, 中国 ; 基础与前沿科学研究所, 中国 ; 基础与前沿科学研究所, 中国 ; 基础与前沿科学研究所, 中国 ; Institute for Advanced Study, 中国 ; 基础与前沿科学研究所, 中国 T1 Rational design of eco-friendly Mn-doped nonstoichiometric CuInSe/ZnSe core/shell quantum dots for boosted photoelectrochemical efficiency YR 2022 IS 8 vo 15 OP 7614-OP 7621 K1 transition metal doping;eco-friendly;photoelectrochemical cell;colloidal quantum dot;optoelectronic engineering AB Colloidal core/shell quantum dots (QDs) with environment-friendly feature and controllable optoelectronic properties are promising building blocks in emerging solar technologies. In this work, we rationally design and tailor the eco-friendly CuInSe (CISe)/ZnSe core/shell QDs by Mn doping and stoichiometric optimization (i.e., molar ratios of Cu/In). It is demonstrated that Mn doping in In-rich CISe/ZnSe core/shell QDs can effectively engineer the charge kinetics inside the QDs, enabling efficient photogenerated electrons transfer into the shell for retarded charge recombination. As a result, a solar-driven photoelectrochemical (PEC) device fabricated using the optimized Mn-doped In-rich CISe/ZnSe core/shell QDs (Cu/In ratio of 1/2) exhibits improved charge extraction and injection, showing a ~ 3.5-fold higher photocurrent density than that of the pristine CISe/ZnSe core/shell QDs under 1 sun AM 1.5G illumination. The findings indicate that transition metal doping in “green” nonstoichiometric core/shell QDs may offer a new strategy for achieving high-efficiency solar energy conversion applications. SN 1998-0124 LA EN