Surface vacancy engineering has emerged as a useful method for enhancing the performance of semiconductor nanocrystals (SNCs). Moreover, it is always anticipated to explore further synthesis mechanism and functional nanomaterials via overcoming kinetic energy barriers of multi-step reactions. Herein, we developed an effective surface-vacancy-engineering-initialized cation exchange (SVEICE) strategy to overcome the kinetic energy barriers of cation exchange reactions from ternary CuInX2 (X = S, Se) to Cu, In dual-doped binary CdX, or ZnX SNCs by precisely tailoring surface Cu and In vacancy identities. These dual-doped SNCs exhibited dual-doped-dependent optoelectronic properties unprecedentedly. Due to the good versatility, this strategy is expected to drive further progress of doped SNC synthesis, cation exchange, and surface vacancy engineering.
Bai, B., Zhao, C., Xu, M., Ma, J., Du, Y., Chen, H., et al. (2020). Unique Cation Exchange in Nanocrystal Matrix via Surface Vacancy Engineering Overcoming Chemical Kinetic Energy Barriers. CHEM, 6(11), 3086-3099 [10.1016/j.chempr.2020.08.020].
Unique Cation Exchange in Nanocrystal Matrix via Surface Vacancy Engineering Overcoming Chemical Kinetic Energy Barriers
Brovelli, S;
2020
Abstract
Surface vacancy engineering has emerged as a useful method for enhancing the performance of semiconductor nanocrystals (SNCs). Moreover, it is always anticipated to explore further synthesis mechanism and functional nanomaterials via overcoming kinetic energy barriers of multi-step reactions. Herein, we developed an effective surface-vacancy-engineering-initialized cation exchange (SVEICE) strategy to overcome the kinetic energy barriers of cation exchange reactions from ternary CuInX2 (X = S, Se) to Cu, In dual-doped binary CdX, or ZnX SNCs by precisely tailoring surface Cu and In vacancy identities. These dual-doped SNCs exhibited dual-doped-dependent optoelectronic properties unprecedentedly. Due to the good versatility, this strategy is expected to drive further progress of doped SNC synthesis, cation exchange, and surface vacancy engineering.
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