標題: A Planarized Thermophotovoltaic Emitter With Idealized Selective Emission
作者: Fu, Sze Ming
Zhong, Yan Kai
Tu, Ming Hsiang
Chen, Bo Ruei
Lin, Albert
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
關鍵字: Photovoltaics (PV);optical properties of photonic materials;metamaterial;thin film coatings
公開日期: 八月-2016
摘要: Compared with conventional solar cells, thermophotovoltaics (TPV) can be more efficient and, thus, exceeds the detailed balance efficiency limit. In particular, the emitter of TPV is a critical design since it determines whether the thermalization loss can be reduced and whether the sub-band-gap radiation can be suppressed, as far as the photovoltaic (PV) process is concerned. In this paper, we propose a selective planar emitter composed of alternating ultrathin metal and dielectric layers. An aperiodic dielectric stacking is designed to tailor the emission spectrum by shaping the emission peak and by adjusting the emission wavelength. We show that the peak emission wavelength (lambda(emission)) is adjustable from lambda = 1500 nm to lambda = 2500 nm. Furthermore, the long-wavelength cutoff is very sharp for our proposed emitter structure, and the absorption is suppressed to 0.1 beyond the cutoff. The preliminary experiment is also conducted to fulfill the concept of a fully planar ultrathin refractory metal emitter design, and the result is similar to the calculated ones. We believe that the planar thermal emitter based on ultrathin metals and aperiodic dielectric stacking is very promising for future thermal emission applications since it requires no lithography and etching, provides strong peak emission power, and possesses wide wavelength scalability.
URI: http://dx.doi.org/10.1109/JPHOT.2016.2594704
http://hdl.handle.net/11536/134109
ISSN: 1943-0655
DOI: 10.1109/JPHOT.2016.2594704
期刊: IEEE PHOTONICS JOURNAL
Volume: 8
Issue: 4
顯示於類別:期刊論文