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Frontiers of Optoelectronics

Front. Optoelectron.    2016, Vol. 9 Issue (1) : 53-59     DOI: 10.1007/s12200-016-0565-8
RESEARCH ARTICLE |
Micro-scale hierarchical photoanode for quantum-dot-sensitized solar cells based on TiO2 nanowires
Heng LI1,2,Wei JING1,2,Dapeng YU1,2,*(),Qing ZHAO1,2,*()
1. State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China
2. Collaborative Innovation Center of Quantum Matter, Beijing 100084, China
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Abstract

This paper proposed a new architecture design for nanowire-based quantum-dot-sensitized solar cells to improve the photovoltaic performance. Microstructured rough substrate was used to increase the surface area of the photoanode without influence on charge carrier transport in the system. Compared to conventional devices, the short circuit current density and power conversion efficiency were enhanced by 50%. And the technology can be widely used in the photoelectrochemical (PEC) field, and it can be combined with other hierarchical nanostructures.

Keywords quantum-dot-sensitized solar cell (QDSSC)      hierarchical structure      TiO2 nanowires     
Corresponding Authors: Dapeng YU,Qing ZHAO   
Just Accepted Date: 21 December 2015   Online First Date: 19 January 2016    Issue Date: 18 March 2016
 Cite this article:   
Heng LI,Wei JING,Dapeng YU, et al. Micro-scale hierarchical photoanode for quantum-dot-sensitized solar cells based on TiO2 nanowires[J]. Front. Optoelectron., 2016, 9(1): 53-59.
 URL:  
http://journal.hep.com.cn/foe/EN/10.1007/s12200-016-0565-8
http://journal.hep.com.cn/foe/EN/Y2016/V9/I1/53
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Heng LI
Wei JING
Dapeng YU
Qing ZHAO
Fig.1  Schematic diagrams of QDSSC photoanodes with rutile nanowires on smooth FTO glass (a), rutile nanowires on rough FTO glass (b), anatase nanoparticles on smooth FTO glass (c), and anatase nanoparticle on rough FTO glass (d). The size of nanoparticles is exaggerated for easy reading
Fig.2  (a) Profile image of rough FTO glass surface; (b) optical microscopic image of rough FTO glass surface; (c) transmission spectra of smooth FTO glass and rough FTO glass
Fig.3  Fig. 3?(a) and (b) SEM images of QDSSC photoanodes with rutile nanowires on rough FTO glass; (c) and (d) cross-section SEM images of QDSSC photoanodes with rutile nanowires on rough FTO glass and smooth FTO glass, respectively
Fig.4  (a) J-V curves of the QDSSCs based on smooth FTO glass and rough FTO glass; (b) PCE as a function of Jsc for smooth FTO glass and rough FTO glass of 24 devices
Fig.5  Profile images (a) and J-V curves (b) of QDSSCs with various average photoanode thickness. The photoanode is based on TiO2 nanoparticles. (c) Photovoltaic properties (PCE, Voc, and Jsc) of the QDSSCs as a function of average photoanode thickness. The photoanode is based on TiO2 nanoparticles
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