Xu Xiangxing, Ji Jianwei, Wang Guan, You Xiaozeng
State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing 210093 (P. R. China), Fax: (+86) 25-83314502.
Chemphyschem. 2014 Aug 25;15(12):2536-41. doi: 10.1002/cphc.201402156. Epub 2014 May 23.
Exciton coupling may arise when chromophores are brought into close spatial proximity. Herein the intra-nanocrystal exciton coupling of the surface complexes formed by coordination of 8-hydroxyquinoline to ZnS nanocrystals (NCs) is reported. It is studied by absorption, photoluminescence (PL), PL excitation (PLE), and PL lifetime measurements. The exciton coupling of the surface complexes tunes the PL color and broadens the absorption and PLE windows of the NCs, and thus is a potential strategy for improving the light-harvesting efficiency of NC solar cells and photocatalysts.
当发色团在空间上紧密靠近时，可能会产生激子耦合。本文报道了通过8-羟基喹啉与硫化锌纳米晶体（NCs）配位形成的表面配合物的纳米晶体内激子耦合。通过吸收、光致发光（PL）、PL激发（PLE）和PL寿命测量对其进行了研究。表面配合物的激子耦合调节了NCs的PL颜色，并拓宽了其吸收和PLE窗口，因此是提高NC太阳能电池和光催化剂光捕获效率的潜在策略。
