Net energy up-conversion processes in CdSe/CdS (core/shell) quantum dots: A possible pathway towards optical cooling

Article

关键词: ANTI-STOKES PHOTOLUMINESCENCE;    SURFACE TRAP STATES;    SEMICONDUCTOR CLUSTERS;    NANOCRYSTALS;    LUMINESCENCE;    EMISSION;    SHELL;    DEPENDENCE;    EFFICIENCY;    SINGLE;   

DOI  :  10.1103/PhysRevB.106.085421

来源: SCIE

【 摘 要 】

An investigation of the possibility of optical refrigeration (OR) on zinc-blende cadmium selenide/cadmium sulfide (CdSe/CdS) core/shell structure quantum dots (QDs) has been carried out. Quality samples were synthesized in our laboratory, and significant energy up-conversion photoluminescence (UCPL) was observed in these samples, showing the potential of generating net cooling effects. To better understand and predict the UCPL characteristics of the QDs, a semiempirical model has been developed, showing good agreement with our experimental results. The model takes into account the corresponding quantum yield and cooling efficiency, predicting the possibility of realizing optical refrigeration on a CdSe QD system.

【 授权许可】

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