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- 2021
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In this study, the electrical and optical properties of Al:ZnO(AZO) and (Ga,Al):ZnO(GAZO) transparent conducting oxide(TCO) according to the deposition temperature were investigated, and the effect on the performance of Cu(In,Ga)Se2(CIGS) thin film solar cells was investigated.
GAZO thin film has higher carrier density and mobility, so its electrical properties are better than AZO thin film. AZO, which has a low carrier density, exhibits excellent optical properties because the transmittance loss in the infrared region due to free carrier absorption is small.
In the case of CIGS thin film solar cell device with AZO TCO applied, efficiency was optimized at 200 ℃, and the device with GAZO TCO was optimized at 150 ℃. Short circuit current(JSC) according to the deposition temperature coincides with the transmittance trend of the TCO thin film, but the open circuit voltage(VOC) and fill factor(FF) tend to decrease above the optimum temperature. It appears to have deteriorated due to prolonged exposure to high temperatures.
When AZO and GAZO are deposited at the optimum temperature, the device with GAZO deposited has better performance than the device with AZO deposited.
The deposition temperature is a very important variable in the thin film deposition process. Also, the high temperature exposure time affects the performance of CIGS thin film solar cells. Therefore, it is necessary to optimize performance considering various variables.
GAZO thin film has higher carrier density and mobility, so its electrical properties are better than AZO thin film. AZO, which has a low carrier density, exhibits excellent optical properties because the transmittance loss in the infrared region due to free carrier absorption is small.
In the case of CIGS thin film solar cell device with AZO TCO applied, efficiency was optimized at 200 ℃, and the device with GAZO TCO was optimized at 150 ℃. Short circuit current(JSC) according to the deposition temperature coincides with the transmittance trend of the TCO thin film, but the open circuit voltage(VOC) and fill factor(FF) tend to decrease above the optimum temperature. It appears to have deteriorated due to prolonged exposure to high temperatures.
When AZO and GAZO are deposited at the optimum temperature, the device with GAZO deposited has better performance than the device with AZO deposited.
The deposition temperature is a very important variable in the thin film deposition process. Also, the high temperature exposure time affects the performance of CIGS thin film solar cells. Therefore, it is necessary to optimize performance considering various variables.
목차
1. 서론 12. 태양전지 개요 32.1 태양전지의 역사 32.2 태양전지의 종류 62.2.1 실리콘(Silicon) 태양전지 82.2.2 화합물 박막 태양전지 92.2.2 염료감응 태양전지 102.3 태양전지의 동작 원리 112.4 태양전지의 특성 평가 172.3.1 Current-Voltage (I-V) 172.3.2 Capacitance-Voltave (C-V) 222.3.3 Quantum Efficiency (QE) 223. CIGS 박막 태양전지 253.1 CIGS 박막 태양전지의 특성 253.2 CIGS 박막 태양전지 제작 283.2.1 기판 세정 283.2.2 후면전극 293.2.3 CIGS 흡수층 293.2.4 버퍼층 303.2.5 투명전극 313.2.6 Grid 333.3 박막 태양전지의 투명전도성산화물 343.3.1 투명전도성산화물 개요 343.3.2 전기적 물성 평가 343.3.3 광학적 물성 평가 393.2.4 구조적 물성 평가 394. n-type ZnO의 증착 온도가 CIGS 태양전지에 미치는 영향 414.1 서론 414.2 실험방법 444.3 실험결과 464.3.1 AZO, GAZO 박막의 전기적 특성과 결정 구조 464.3.2 AZO, GAZO 박막의 광학적 특성 534.3.3 AZO, GAZO를 적용한 CIGS 태양전지 성능 595. 결론 74참고문헌 76Abstract 81
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