Density of state determination of two types of intra-gap traps in dye-sensitized solar cells and its influence on device performance

2014 ◽  
Vol 16 (23) ◽  
pp. 11626-11632 ◽  
Author(s):  
Yi Wang ◽  
Dapeng Wu ◽  
Li-Min Fu ◽  
Xi-Cheng Ai ◽  
Dongsheng Xu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Device Performance ◽  
Density Of State ◽  
Dye Sensitized ◽  
State Determination ◽  
Sensitized Solar Cells

Titanium Dioxide Nanotubes Decorated with Nanoparticles for Dye Sensitized Solar Cells

2011 ◽  
Vol 1303 ◽  
Author(s):  
Xuan Pan ◽  
Yong Zhao ◽  
Changhong Chen ◽  
Zhaoyang Fan
Keyword(s):  
Titanium Dioxide ◽  
Solar Cells ◽  
Conversion Efficiency ◽  
Electrochemical Impedance ◽  
Dye Sensitized Solar Cells ◽  
Photon Absorption ◽  
Device Performance ◽  
Dye Sensitized ◽  
Dye Loading ◽  
Sensitized Solar Cells

ABSTRACTThe titanium dioxide (TiO2) nanoparticle (NP) structure has higher surface area and dye loading value to increase photon absorption while the nanotube (NT) can suppress the random walk phenomena to enhance carrier collection. In this work, hydrothermal method was utilized to infiltrate the TiO2 nanotube array by TiO2 nanoparticles with the aim of combining the advantages of both nanostructures to improve dye sensitized solar cells (DSSCs) efficiency. Structure morphology, device performance, and electrochemical properties were investigated. SEM observation confirmed that around 10 nm TiO2 nanoparticles uniformly covered the NT wall. TiO2 NT samples at three different lengths: 8 μm, 13 μm and 20 μm, decorated with different amount of nanoparticles were studied to optimize the structure for light absorption and electron transport to achieve high solar conversion efficiency. Electrochemical impedance spectroscopy (EIS) was also employed to investigate the cells’ parameters: electron lifetime (τ), diffusion length (Ln) et al, to gain insight on the device performance. The incident photon conversion efficiency (IPCE) was also reported.

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