Hybrid P3HT/TiO2 Nanorods Bulk Heterojunction Solar Cells
Date Issued
2007
Date
2007
Author(s)
Huang, Tse-Kai
DOI
zh-TW
Abstract
The investigations focus on hybrid materials photovoltaic properties of organic conjugated polymer and inorganic nano-semiconductor. First of all, we discuss how TiO2 nanorods support charge separation and charge transport in TiO2/P3HT hybrid solar cells. Therefore we tune the TiO2 doping concentration to optimize devices performance.
Secondly, we focus on the topic of thermal treatment effect on devices performance. It is observed that devices performance could significantly enhance after high temperature annealing. Based on optical properties, XRD, and Time-of-Flight carrier mobility measurement system, we discover that after annealing both the crystallite size and carrier mobility increasing.
Finally, we use synthesis method to change the length of TiO2 nanorods and investigate the length dependent effect on devices performance. We know that TiO2 inclusion supports both charge separation and transport, therefore we focus on different length of TiO2 nanorods effect on charge separation and transport properties. At the same doping concentration, the shorter TiO2 nanorods result in more surface area and contribute to more efficient charge separation; the otherwise the longer TiO2 nanorods could easily form continuous transport path to support efficient charge transport. Based on the balance of these two effects, we try to find the maximal performance of TiO2/P3HT hybrid solar cells.
Subjects
二氧化鈦
有機太陽能電池
TiO2
P3HT
solar cell
SDGs
Type
thesis
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