태양광전지는 빛에너지를 전기에너지로 직접 변환시켜 주는 소자이다. 이들은 다양한 종류의 재료로 만들어지고 있고 현재 가장 많이 사용되고 있는 재료는 단결정 Si이다. 그러나 단결정 Si 태양광전지는 제조단가를 더 이상 낮출 수 없는 문제와 생산 및 응용에 부적합한 근본적인 문제들이 있어 최근 들어서는 박막 형태의 태양광전지의 개발이 활발히 이루어지고 있다. 본 논문에서는 이러한 박막형태의 태양광전지 제조 기술의 현황에 대해 살펴보고 또한 박막 태양광전지의 향후 전망에 대해 서술하였다.
Photovoltaic devices directly convert solar energy into electrical energy. These devices are currently fabricated by using a variety of materials, among which the single-crystalline Si is most widely used. The single-crystalline Si solar cells, however, have inherent drawbacks and limitations, in which substantial cost reductions are required for large scale applications, and difficulties remain in new product development such as flexible solar cells. An alternative approach to overcome these limits of crystalline Si solar cells is to develop thin film solar cells. This paper addresses the current status of thin film photovoltaic technology and provides the outlook of future solar cells.
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