@article{Wang2022, 
author = {Rui Wang and Xin Tong and Zhihang Long and Ali Imran Channa and Hongyang Zhao and Xin Li and Mengke Cai and Yimin You and Xuping Sun and Zhiming Wang},
title = {Rational design of eco-friendly Mn-doped nonstoichiometric CuInSe/ZnSe core/shell quantum dots for boosted photoelectrochemical efficiency},
year = {2022},
journal = {Nano Research},
volume = {15},
number = {8},
pages = {7614-7621},
keywords = {transition metal doping, eco-friendly, photoelectrochemical cell, colloidal quantum dot, optoelectronic engineering},
url = {https://www.sciopen.com/article/10.1007/s12274-022-4334-2},
doi = {10.1007/s12274-022-4334-2},
abstract = {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.}
}