Photoelectrochemical performance of Cu-doped ZnIn2S4 electrodes created using chemical bath deposition
| Autor: | Kong-Wei Cheng, Chao Ming Huang, Wang Lin Liu, Chao Kai Shu, Chun Ting Li, Ya Chien Yu |
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| Rok vydání: | 2011 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Scanning electron microscope business.industry Chemistry Analytical chemistry Reference electrode Surfaces Coatings and Films Electronic Optical and Magnetic Materials Light intensity Optics Semiconductor Electrode Atomic ratio Electronic band structure business Chemical bath deposition |
| Zdroj: | Solar Energy Materials and Solar Cells. 95:1940-1948 |
| ISSN: | 0927-0248 |
| DOI: | 10.1016/j.solmat.2011.02.026 |
| Popis: | A solution growth method for the deposition of Cu-doped zinc–indium–sulfide (ZnIn 2 S 4 ) semiconductor film electrodes is presented. The structural, optical, and photoelectrochemical (PEC) properties of samples were studied as a function of Cu content in samples. The X-ray diffraction pattern of the cubic ZnIn 2 S 4 phase of an undoped sample was obtained. No Cu alloys or other binary compounds that included the Cu element were present in Cu-doped ZnIn 2 S 4 samples. Images from a scanning electron microscope and atomic ratios of elements in samples obtained from the energy dispersion analysis of X-ray reveal a change in surface morphology and composition for Cu-doped ZnIn 2 S 4 samples. The direct energy band gaps, indirect energy band gaps, and thicknesses of samples prepared in this study varied in the ranges 2.07–2.58 eV, 1.60–2.06 eV, and 521–879 nm, respectively. The maximum photoelectrochemical response of samples in 0.5 M K 2 SO 4 aqueous solution reached 1.15 mA cm −2 at an external potential of +1.0 V vs. an Ag/AgCl reference electrode under illumination using a 300-W Xe lamp with light intensity kept at 100 mW cm −2 . The experimental results show that Cu doping with Cu/(Cu+Zn) atomic ratio of 0.08 in samples improves the performance of the ZnIn 2 S 4 photoabsorber for PEC applications. |
| Databáze: | OpenAIRE |
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