| 학회 |
한국재료학회 |
| 학술대회 |
2013년 봄 (05/23 ~ 05/24, 여수 엠블호텔(THE MVL)) |
| 권호 |
19권 1호 |
| 발표분야 |
C. 에너지/환경 재료(Energy and Environmental Materials) |
| 제목 |
A Facile and Low-Cost Synthesis of promising absorber materials on Cu2ZnSn(SxSe1-x)4 Nanocrystals consisting of Earth Abundant Elements with Tunable Band Gap Characteristics |
| 초록 |
We report a facile, low cost synthesis and characterization of kesterite Cu2ZnSn(Sx,Se1-x)4 (CZTSSe) nanocrystals (NCs) by a two-step process of solution-based precursor and post-annealing route. The effects of different Se vaporization temperatures, ranging from 350 ºC to 550 ºC, on the structural, chemical, compositional, chemical and optical properties of CZTSSe NCs were investigated. X-ray diffraction patterns, Raman spectroscopy, and transmission electron microscopy results indicated that the precursor powder showed several broad peaks that could not be assigned to CZTS, ZnS, Cu2-xS, Sn2S3 and Cu2SnS3. However, the post-annealed NCs with and without Se vaporization were a single kesterite CZTS phase without a secondary phase. UV-vis spectroscopy results showed that the absorption coefficients of all the post-annealed NCs was over 104 cm-1 in the visible region, and the optical band gap energy decreased systematically from 1.46 eV to 1.14 eV with increasing Se vaporization temperatures. |
| 저자 |
Seung Wook Shin1, Jun Hee Han1, Chae Hwan Jeong2, Jae Ho Yun3, Jeong Yong Lee1, Jin Hyeok Kim4
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| 소속 |
1KAIST, 2생산기술(연), 3에너지기술원, 4전남대 |
| 키워드 |
CZTS; nanocrystals; earth abuntant element; facile and low cost synthesis
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| E-Mail |
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