Cu2ZnSn(S,Se)4 Nanocrystals as Light Harvesting Layer for Thin Film Solar Cells

• Main Authors: Yu-Hsiang Tsai, 蔡豫翔
• Other Authors: Liang-Yih Chen
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/31778049527939284856

碩士 === 國立臺灣科技大學 === 化學工程系 === 102 === Recently, copper zinc tin sulfide (Cu2ZnSnS4, CZTS) has attracted great attention as a material of earth-abundant, non-toxicity, and with novel absorption coefficient (>10-4 cm-1) to become a promising solid-state photovoltaic device material. CZTS is suitable light-harvesting materials for thin film solar cell because of band gap is about 1.3-1.8eV. In this study, CZTS nanocrystals are synthesized by injection method using copper (II) acetate, zinc iodide, tin(IV) chloride tetrahydrate, elemental sulfur as precursors in the presence of oleylamine at high reaction temperature. CZTS nanocrystals with hexanethiol formulated as ink to coat on the Mo-coated glass substrate. The CZTS thin films were coated with different coating methods for comparison. To investigate the nature of the film and analysis the film properties by changing the selenization reaction time, heating time and maintain time.The thin film morphology is observed by high resolution field-emission scanning electron microscope. By Raman and X-ray diffractometer (XRD) analysis to demonstrate the phase transition and grain growth.