Poly(N-vinylcarbazole) (PVK) Photoconductivity Enhancement Induced by Doping with CdS Nanocrystals through Chemical Hybridization
Poly(N-vinylcarbazole) (PVK) Photoconductivity Enhancement Induced by Doping with CdS Nanocrystals through Chemical Hybridization
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DOI：
10.1021/jp0005064
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发表时间：
2000-11
影响因子：
3.3
通讯作者：
Suhua Wang;Shih-Hsuan Yang;Chu-Shou Yang;Zongquan Li;Jiannong Wang;W. Ge
中科院分区：
文献类型：
--
作者：
Suhua Wang;Shih-Hsuan Yang;Chu-Shou Yang;Zongquan Li;Jiannong Wang;W. Ge
本文采用可控磺化法对聚N-乙烯基咔唑（PVK）进行了功能化。在磺化的PVK基质中合成了直径为3 - 20 nm的CdS纳米晶体，其中CdS的摩尔分数为0.01 - 18%。CdS纳米粒子的尺寸随着CdS的摩尔分数的增加而增加。在高CdS摩尔分数下，CdS纳米晶以立方相和六方相存在。PVK的光致发光效率随着CdS摩尔分数的增加而降低，这是由于界面电荷转移引起的猝灭。光致发光归因于CdS纳米晶体可以观察到只有在低摩尔分数的CdS。在PVK中的CdS的化学掺杂诱导的光电导的显着增强也已被证明。
We have functionalized poly(N-vinyl carbazole) (PVK) by controlled sulfonation. CdS nanocystals of 3−20 nm across were synthesized in the sulfonated PVK matrix with the CdS molar fraction of ∼1−18%. The CdS nanoparticle size increased with the molar fraction of CdS. At high CdS molar fractions, the CdS nanocrystals exist in both cubic and hexagonal phases. Photoluminescence efficiency of PVK decreases when the molar fraction of CdS increases due to quenching through interfacial charge transfer. Photoluminescence attributable to the CdS nanocrystals can be observed only at low molar fractions of CdS. Significant enhancement in photoconductivity induced by the chemical doping of CdS in PVK has also been demonstrated.