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Spatially Controlled Doping via High Diffusion Dynamics in Perovskite Nanocrystals for Efficient and Stable CO2
Ha Som Oh1, Byung Jun Yoo1, Gaeun Cho2
1Department of Chemistry, Myongji University, 116 Myongji Ro, Yongin, Gyeonggi-do 17058, South Korea.
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A well-designed and precisely engineered electronic structure in heavily doped perovskite nanocrystals (PNCs) is critical for the development of high-performance photocatalysts. However, strategies to enhance doping density with various dopants are considerably limited due to lattice stress-induced structural instability. In this study, a novel high-diffusion-driven doping method was developed to control doping sites with high doping density for PNCs. Inner-site and surface doping with distinct dopants can be separately introduced in a one-pot procedure. Inner-site dopants were chosen to control the carrier transfer efficiency and structural stability, while surface dopants were selected for creating effective active sites for the target reaction. As a result, doped PCNs via high-diffusion-driven method demonstrated effective CO2 to ethanol conversion under AM1.5 illumination.
