Raman and photoluminescence investigation of CdS/CdSe quantum dots on TiO₂ nanoparticles with multi-walled carbon nanotubes and their application in solar cells

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• 作者：Kun-Mu Lee^a ; ^b ; Sheng Hsiung Chang^a ; ^{shchang@ncu.edu.tw" class="auth_mail" title="E-mail the corresponding author} ; Ming-Chung Wu^c ; Chun-Guey Wu^a ; ^d ; ^{t610002@cc.ncu.eud.tw" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Energy transfer ; Raman scattering ; Photoluminescence
• 刊名：Vibrational Spectroscopy
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：80
• 期：Complete
• 页码：66-69
• 全文大小：1156 K

文摘

Raman spectroscopy and photoluminescence (PL) were used to investigate the improved short-circuit current density (J_SC) of CdS/CdSe quantum dot (QD)-sensitized solar cells with multi-walled carbon nanotubes (MWCNTs). Raman and PL experiments were carried out in order to explore the hot-electron and cold-electron injections, respectively. The experimental results showed that the concentration of MWCNTs influences the hot-electron and cold-electron injections from CdS/CdSe QDs to TiO₂ nanoparticles. Therefore, the improved J_SC in CdS/CdSe QD-sensitized solar cells can be explained as due to the better electron injections.