Influence of copper concentration in solutions on the growth mechanism and performance of electrodeposited Cu(In,Al)Se2 solar cells

Kuo Chan Huang, Chien Lin Liu, Pin Kun Hung, Mau Phon Houng

研究成果: Article同行評審

14 引文 斯高帕斯(Scopus)

摘要

We conducted a chronoamperometric study to observe the electrochemical behaviors of the nucleation mechanism of electrodeposited Cu(In,Al)Se 2 films. A change from instantaneous nucleation to progressive nucleation was observed by increasing the copper concentration. SEM and EDS analyses demonstrated that the surface morphologies and chemical compositions of precursor and post-annealed Cu(In,Al)Se2 films were influenced by the nucleation mechanism. They exhibited that Cu(In,Al)Se2 films had roughly cauliflower-like and triangular structures with Cu-poor composition at the instantaneous nucleation mechanism, whereas smooth and round structures with Cu-rich composition at the progressive nucleation mechanism. Additionally, the quality, growth orientation, composition phase, and optical energy band gap of Cu(In,Al)Se2 films were examined using X-ray diffraction (XRD) patterns, Raman spectra, and (αhν)2 vs. hν plots (UV-vis). Thereafter, the performances of rudimentary Cu(In,Al)Se2 solar cells fabricated at various copper concentrations were discussed, the conversion efficiency of electrodeposited Cu(In,Al)Se2 solar cells were unpublished in previous literatures. Our studies demonstrated that the performances of Cu(In,Al)Se2 solar cells were significantly related to the surface morphology and composition of Cu(In,Al)Se2 absorber layer. The highest conversion efficiency of Cu(In,Al)Se2 solar cells fabricated at a 2-mM copper concentration was 1.96% with open-circuit voltage, short-circuit current, fill factor, Rsh and Rs values of 0.189 V, 29.21 mA/cm2, 35.4%, 125 Ω and 2.82 Ω, respectively.

原文English
頁(從 - 到)27-35
頁數9
期刊Solar Energy Materials and Solar Cells
128
DOIs
出版狀態Published - 2014 九月

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 可再生能源、永續發展與環境
  • 表面、塗料和薄膜

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