https://scholars.lib.ntu.edu.tw/handle/123456789/407367
標題: | Preparation and characterization of Cu(In,Ga)Se2 thin films via direct heating selenium-ion containing precursors | 作者: | Ma J.-S. Yang C.-Y. Sung J.-C. Som S. Lu C.-H. |
關鍵字: | CIGS;Solar cell;Spin-coating process;Thin film | 公開日期: | 2015 | 卷: | 41 | 來源出版物: | Ceramics International | 摘要: | Polycrystalline Cu(In,Ga)Se2 thin films were synthesized as absorber layers in solar cells using a simple synthetic route. In this synthesis, selenium ion-containing precursors were heated in a reducing atmosphere to yield CIGS films instead of conventional heating in a selenium-containing atmosphere. Selenium ions were incorporated into the precursor films to form chalcopyrite-type CIGS films at comparatively low temperature (350¢XC). As the heating temperature increased, the crystallinity and density of the formed CIGS films improved. The open circuit voltage (V oc), short circuit current density (J sc), fill factor (FF) and conversion efficiency (£b) of the prepared solar cells also substantially increased with the heating temperature. CIGS solar cells with absorber layers that had been heated at 550¢XC exhibited a conversion efficiency of 8.27%. The corresponding values of V oc, J sc, and FF were obtained as 0.452V, 32.9mA/cm2 and 55.5% respectively. The diode parameters were reduced and the external quantum efficiency (EQE) of the CIGS solar cells was improved by increasing the heating temperature. The photoluminescence peaks that were associated with the donor-acceptor pairs became weaker as the heating temperature increased. The suppression of electron-hole recombination led to improve the photovoltaic properties of the solar cells. This study demonstrates that directly heating selenium ion-containing precursors is an effective way to prepare highly efficient CIGS absorber layers for solar cells applications. ? 2015 Elsevier Ltd and Techna Group S.r.l. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/407367 | ISSN: | 02728842 | DOI: | 10.1016/j.ceramint.2015.05.042 | SDG/關鍵字: | Conversion efficiency; Copper compounds; Efficiency; Heating; Ions; Open circuit voltage; Selenium; Solar absorbers; Solar cells; Solar power generation; Temperature; Thin films; CIGS; CIGS absorber layers; Conventional heating; Electron-hole recombination; External quantum efficiency; Photoluminescence peak; Photovoltaic property; Spin coating process; Film preparation |
顯示於: | 化學工程學系 |
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