9:30 AM - 11:30 AM
[22a-P4-8] Proposal of Integrated Sensitized Solar Cell Films Based on Sputtered ZnO Thin Films
Keywords:sensitization,solar cells,sputtered ZnO thin films
To improve the performance of sensitized solar cells, we propose the waveguide-type sensitized solar cell based on sputtered oxide semiconductor thin films. Here, guided lights in the thin films are used to generate photocurrents instead of normally-incident lights. In this configuration the lights pass through a substantial number of dye molecules to enhance the light absorption.
We also propose integrated sensitized solar cell films, in which the waveguide-type sensitized solar cells are embedded in a light beam collecting film consisting of two stacked films; a film with tapered vertical waveguides and a film with planar waveguides having vertical mirrors. Incident lights are collected by the waveguides, and are guided to the solar cells. Expected advantages are as follows; reduction of semiconductor consumption, availability of optical circuit functions, and light-weight and flexible characteristics.
We previously succeeded in dye sensitization of vacuum-evaporated ZnO films by the liquid-phase molecular layer deposition (LP-MLD). To improve the film quality, we attempt to replace the ZnO films with sputtered films. Two sensitization processes are investigated for the sputtered ZnO thin films; (a) by a multi-dye stacked structure grown using LP-MLD and (b) by a ZnO/Cr2O3 multi-layer, which is regarded as a multiple quantum wells with different well widths. These structures are expected to widen the photocurrent spectra. For experimental results, they will be presented in the conference presentation.
We also propose integrated sensitized solar cell films, in which the waveguide-type sensitized solar cells are embedded in a light beam collecting film consisting of two stacked films; a film with tapered vertical waveguides and a film with planar waveguides having vertical mirrors. Incident lights are collected by the waveguides, and are guided to the solar cells. Expected advantages are as follows; reduction of semiconductor consumption, availability of optical circuit functions, and light-weight and flexible characteristics.
We previously succeeded in dye sensitization of vacuum-evaporated ZnO films by the liquid-phase molecular layer deposition (LP-MLD). To improve the film quality, we attempt to replace the ZnO films with sputtered films. Two sensitization processes are investigated for the sputtered ZnO thin films; (a) by a multi-dye stacked structure grown using LP-MLD and (b) by a ZnO/Cr2O3 multi-layer, which is regarded as a multiple quantum wells with different well widths. These structures are expected to widen the photocurrent spectra. For experimental results, they will be presented in the conference presentation.