Yb, Tm co-doped YF3 upconverter for quantum dot-sensitized solar cells

ZHAI Jin; WANG Kefeng; JIANG Jiaqiao; WAN Sijie

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Yb, Tm co-doped YF3 upconverter for quantum dot-sensitized solar cells

ZHAI Jin * #,WANG Kefeng,JIANG Jiaqiao,WAN Sijie

Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, School of Chemistry and Environment, Beihang University, Beijing 100191, PR China.

*Correspondence author

#Submitted by

Subject:

Funding: Ph.D. Programs Foundation of Ministry of Education of China（No.30400002011127001）, National Basic Research Program（No.2011CB935704, 2012CB720904）, National Natural Science Foundation of China（No.91333120）

Opened online: 5 February 2015

Accepted by: none

Citation: ZHAI Jin,WANG Kefeng,JIANG Jiaqiao.Yb, Tm co-doped YF3 upconverter for quantum dot-sensitized solar cells[OL]. [ 5 February 2015] http://en.paper.edu.cn/en_releasepaper/content/4631235

Through upconversion process, rare earth ion-doped upconverters could emit visible light under the excitation of the infrared light, which falls into the absorption range of quantum dots. Therefore, it is reasonable to combine upconverters with quantum dot-sensitized solar cells (QDSSCs) to indirectly utilize infrared light for extending the light absorption ability of quantum dots and enhancing the photoelectric conversion efficiency of QDSSCs. Yb, Tm co-doped YF3 (Ln-YF3) has been integrated into the photoanodes for quantum dot-sensitized solar cells (QDSSCs). Compared with the control electrode of pure P25, the photoanode with Ln-YF3 exhibits an enhanced photovoltaic performance with an short-circuit current of 11.26 mA/cm2 and a power conversion efficiency of 3.57 %. UV-Vis reflection spectrum as well as the incident photon to charge carrier efficiency (ICPE) measurement results indicate that no obvious light scattering effect occurs in the photoanode with Ln-YF3, indirectly confirming the upconversion-induced enhancement in the photovoltaic performance of the QDSSCs based on the photoanode with upconverters.

Keywords:upconverter; quantum dot; solar cells

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