銀銅銦鎵硒薄膜太陽電池之製備與特性分析

Preparation and Characterization of Silver Copper Indium Gallium Diselenide Thin-film Solar Cells

吳俊杰(Jyun-Jie Wu)

指導教授 ： 呂宗昕

國立臺灣大學/工學院/化學工程學研究所/碩士(2014年)

https://doi.org/10.6342/NTU.2014.10267

摘要

本研究成功開發用於製備銀銅銦鎵硒((Ag,Cu)(In,Ga)Se2)薄膜的非真空製程。藉由旋轉塗佈法接著於600oC硒化0.5 h成功製備黃銅礦結構之銀銅銦鎵硒薄膜。硒化溫度大幅影響所製備薄膜之晶相和微結構。當硒化溫度提高時，由於銀和鎵離子的併入使銀銅銦鎵硒相被促進形成。此外，薄膜晶粒尺寸提高。單相且具有2.1-2.3 μm的銀銅銦鎵硒薄膜在硒化600oC後被得到。薄膜晶相和微結構的改善大幅提高銀銅銦鎵硒太陽能電池效率和光譜反應。
本研究第二部分探討銀離子含量對於銀銅銦鎵硒薄膜特性之影響。不同銀含量被證實成功摻入銅銦鎵硒薄膜而形成銀銅銦鎵硒薄膜。當銀離子比例增加時，銀銅銦鎵硒薄膜之能隙被提高。此外，銀銅銦鎵硒薄膜變大的晶粒和緻密化也被觀察到。在薄膜形成過程中，具有低熔點之(Cu,Ag)2In合金相被視為藉由液相燒結促進薄膜的晶利成長和緻密化。銀銅銦鎵硒薄膜的緻密化抑制了硒化過程中薄膜與硒不足有關的缺陷產生。上述薄膜性質的改善大幅提升銀銅銦鎵硒太陽能電池光電特性。

關鍵字

銀銅銦鎵硒 ； 薄膜太陽能電池 ； 旋轉塗佈法 ； 非真空製程 ； 摻雜 ； 銅銦鎵硒

並列摘要

The non-vacuum process employed to prepare silver copper indium gallium diselenide ((Ag,Cu)(In,Ga)Se2) thin films has been developed in this thesis. Chalcopyrite (Ag,Cu)(In,Ga)Se2 thin films were successfully synthesized via the spin-coating process followed by selenization at the temperature of 600oC for 0.5 h. The selenization temperature significantly influenced the crystalline phase and the microstructures of the films. On raising the selenization temperature, the phase formation of (Ag,Cu)(In,Ga)Se2 was promoted owing to the incorporation of silver ions and gallium ions into CuInSe2. In addition, the grain size of the films was enlarged. Monophasic (Ag,Cu)(In,Ga)Se2 films with a grain size of 2.1-2.3 μm were obtained after selenization at 600oC. The improvement in the crystalline phases and the microstructures of the films substantially enhanced the efficiency and the spectral response of (Ag,Cu)(In,Ga)Se2 solar cells.
In the second part, the effects of silver-ion content on the properties of (Ag,Cu)(In,Ga)Se2 films were investigated. The various contents of silver ions were confirmed to be doped into Cu(In,Ga)Se2 to form (Ag,Cu)(In,Ga)Se2 successfully. On raising the content of silver ions, the band gaps of (Ag,Cu)(In,Ga)Se2 films were found to be increased. In addition, the enlarged grain size and the densification of (Ag,Cu)(In,Ga)Se2 films were also observed. It was considered that (Cu,Ag)2In alloy phase with a low melting point facilitated the grain growth and the densification of the films via a liquid-phase sintering during the film formation. The densification of the films suppressed the formation of defects associated with the selenium deficiencies in the films. The above improvement in the properties of (Ag,Cu)(In,Ga)Se2 films significantly improved the photovoltaic properties of the solar cells.

並列關鍵字

(Ag,Cu)(In,Ga)Se2 ； ACIGS ； Thin-Film Solar Cells, Spin-Coating process ； Non-vacuum process ； Cu(In,Ga)Se2

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