Room-temperature preparation of crystalline TiO2 thin films and their applications in polymer/TiO2 hybrid optoelectronic devices
Room-temperature preparation of crystalline TiO2 thin films and their applications in polymer/TiO2 hybrid optoelectronic devices
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DOI：
10.1016/j.orgel.2011.03.004
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发表时间：
2011-06
影响因子：
3.2
通讯作者：
Chung-Han Wu;Hanying Li;H. Fong;V. Pozdin;L. Estroff;G. Malliaras
中科院分区：
文献类型：
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作者：
Chung-Han Wu;Hanying Li;H. Fong;V. Pozdin;L. Estroff;G. Malliaras
Highly homogeneous crystalline TiO2thin films with very low surface roughness were prepared by spin-coating of a TiO2nanoparticle aqueous dispersion at room temperature without further heat treatment. Using these films as electron transporting layers, inverted structure hybrid photovoltaic cells (TiO2/P3HT) and light-emitting diodes (TiO2/F8BT) were demonstrated. The photovoltaic cells exhibited an energy conversion efficiency of 0.26%, which is similar to that of cells utilizing TiO2layers sintered at high temperatures. Moreover, the light-emitting diodes showed an efficiency of 0.65cd/A, which is higher than obtained from a reference inverted diode (0.1cd/A). These measurements demonstrate that a properly designed nanoparticle casting route can help avoid high temperature crystallization or sintering steps for TiO2thin films, paving the road for their use in conjunction with plastic substrates.
