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작성일 : 14-09-29 15:11
Lossless hybridization between photovoltaic and thermoelectric devices
 글쓴이 : 최고관리자
조회 : 1,235  
Our theoretical and experimental results indicate that resistance matching is of significant importance for optimal operation of a hybrid circuit. Furthermore, we demonstrated that FF and voltage gains are obtained by properly selecting the internal resistance and the number of TE elements. It is also important to properly design a TE device in accordance with the J–V characteristics of selected PV cells. Otherwise, a hybrid PV-TE device may perform worse than a sole PV cell, as demonstrated in our experiments. Our theoretical and experimental study not only showed the feasibility of lossless coupling between PV and TE but also improved the efficiency of the PV device by 30%, which increased from 12.5% (Pmax = 50 mW) to 16.3% (Pmax = 65.2 mW) by simply adding a TE device with only a 15oC temperature gradient.
This lossless coupling could be achieved in actual solar conditions emulating the variation of incoming solar fluxes. We expect that scale-up devices with larger temperature gradients will further improve hybrid device performance.