期刊
APPLIED PHYSICS LETTERS
卷 106, 期 1, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4905177
关键词
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资金
- New Energy and Industrial Technology Development Organization (NEDO) under the Ministry of Economy, Trade and Industry (METI)
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning (MSIP) of Korea [NRF-2009-0092950]
- National Research Foundation of Korea [2009-0092951, 2011-0008467] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
We have applied an optical splitting system in order to achieve very high conversion efficiency for a full spectrum multi-junction solar cell. This system consists of multiple solar cells with different band gap optically coupled via an optical splitter. An optical splitter is a multi-layered beam splitter with very high reflection in the shorter-wave-length range and very high transmission in the longer-wave-length range. By splitting the incident solar spectrum and distributing it to each solar cell, the solar energy can be managed more efficiently. We have fabricated optical splitters and used them with a wide-gap amorphous silicon (a-Si) solar cell or a CH3NH3PbI3 perovskite solar cell as top cells, combined with mono-crystalline silicon heterojunction (HJ) solar cells as bottom cells. We have achieved with a 550 nm cutoff splitter an active area conversion efficiency of over 25% using a-Si and HJ solar cells and 28% using perovskite and HJ solar cells. (C) 2015 AIP Publishing LLC.
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