Near-Infrared Light-Induced Photocurrent from a (NaYF4:Yb-Tm)/(Cu2O) Composite Thin Film

被引：35

作者：

Jia, Hong ^{[1
]}

Zheng, Shu Hong ^{[1
]}

Xu, Cheng ^{[1
]}

Chen, Wei Bo ^{[1
]}

Wang, Jue Chen ^{[1
]}

Liu, Xiao Feng ^{[1
]}

Qiu, Jian Rong ^{[1
,2
]}

机构：

[1] Zhejiang Univ, Dept Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China

[2] S China Univ Technol, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China

来源：

ADVANCED ENERGY MATERIALS | 2015年 / 5卷 / 02期

基金：

中国国家自然科学基金;

关键词：

electrodeposition; up-conversion; photoactive current; photovoltaic devices; thin films; SENSITIZED SOLAR-CELLS; TIO2 NANOTUBE ARRAYS; UP-CONVERSION; EPITAXIAL ELECTRODEPOSITION; PHOTOCATALYTIC ACTIVITY; ENHANCED PERFORMANCE; CU2O NANOCUBES; NANOCRYSTALS; PHOTOLUMINESCENCE; FABRICATION;

D O I：

10.1002/aenm.201401041

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Utilization of photons of sub-bandgap energy, mostly near-infrared (NIR) photons, is highly desirable for photovoltaic devices. We show that (NaYF4:Yb-Tm)/(Cu2O) composite films formed by electrodeposition exhibit robust photoactive current generation under NIR light excitation. The composite films consist of homogeneous crystalline particles of the fluoride and Cu2O in sub-micrometer size. From spectroscopic characterization, it is found that the NaYF4:Yb-Tm layer in the composite film converts NIR radiation by up-conversion into visible emission, which is efficiently absorbed by the covering semiconducting Cu2O film, producing photoelectrons. Accordingly, the composite films exhibit highly photoactive current generation by means of a photoelectrochemical process driven by NIR irradiation. The methodology demonstrated here may have certain implications for the utilization of NIR radiation in solar cells, photocatalysts, and infrared photodetectors.

引用

页数：7

共 56 条

[31] Upconversion-P25-graphene composite as an advanced sunlight driven photocatalytic hybrid material [J].