Abstract
An effective metal oxide coating with solution processes by the metal organic decomposition method as deposited at room temperature (RT) poses great challenge. In this study, we report the characterization and evaluation of the semiconductor properties of a zinc hydroxide thin film with RT just as deposition by solution coating method. The films worked well as an inter-layer of the organic photovoltaic cell and optimized the film thickness condition with chemical and physical properties. As a result, we achieved a power conversion efficiency performance level, which was almost similar to that in the cells used after calcination in the crystal ZnO inter-layer. The presented process without any additional decomposition energy is expected to make a significant contribution to the realization of a flexible and cost-effective solution process for device fabrication.
Highlights
An effective metal oxide coating with solution processes by the metal organic decomposition method as deposited at room temperature (RT) poses great challenge
We demonstrate that room temperature (RT)-processed ZnOx and ZnOHx films prepared through the metal organic decomposition (MOD) method can be successfully used as the inter-layer of organic photo voltaic (OPV) cells
OPV cells, including the a-ZnOHx inter-layer, showed the same order of OPV performance to that of a cell containing the crystallized ZnO (c-ZnO) layer. This result implied that a-ZnOHx films can be adapted for use as the inter-layer of OPV cells as long as thin films are used as the semiconductors
Summary
Makoto Karakawa[1], Tohru Sugahara[2], Yukiko Hirose[2], Katsuaki Suganuma2 & Yoshio Aso[2]. Numerous research attempts have recently focused on organic electronics using metal oxides as inter-layers aligning the energy level between the organic semiconductor layer and the electrodes at the interface[1,2,3,4,5,6,7,8] These researchers realized various interesting functions when combined with organics. L.K. Jagadamma et al recently demonstrated the good performance of amorphous ZnO fabricated at 100–110 °C15 as an organic photo voltaic (OPV) cell inter-layer, suggesting the possibility of using amorphous films in electric devices. We demonstrate that room temperature (RT)-processed ZnOx and ZnOHx films prepared through the metal organic decomposition (MOD) method can be successfully used as the inter-layer of OPV cells. This result implied that a-ZnOHx films can be adapted for use as the inter-layer of OPV cells as long as thin films are used as the semiconductors
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