针对一维(1D)Si/SiO_2光子晶体滤波器在GaSb热光伏电池特征波长处存在较大反射峰的问题,根据等效折射率理论,将其基本结构由(L/2HL/2)~5改进为[1.10(L/2HL/2)](L/2HI/2)~3[1.10(L//2HI/2)].结果表明:改进的滤波器在特征波长处的透过率有较大提高,且抑制了长波光子的透过.辐射器为1250℃的黑体时,采用改进滤波器的TPV系统的光谱效率为33.3%,输出电功率密度为1.06W·cm~(-2),相对于采用原滤波器的TPV系统增长幅度均超过了10%,电池效率也有所提高.%To elimate the reflectance peak of one-dimensional(lD) Si/SiO_2 photonic ciystals(PC) filter around the char-acteristic wavelength for PV cells, the basic (L/2HL/2)~5 structure of the PC filter was improved to [ 1.10(L/2HL/2) ] (L/ 2HL/2)~3[1.10(L/2HL/2)] basing on the theory of equivalent refractive index. The simulated result indicated that the improved filter has better transmittace around the characteristic wavelength, besides suppressing the transmitting of long-wavelength photonics. The spectral efficiency of TPV system fabricating of these improved PC filter and a blackbody radi-ator at 1250℃ is 33.3% , and the output electricity power density is 1.06W·cm~(-2), both of which increase over 10% comparing to the system adopting the original PC filter. The cell efficiency has slight increament as well.
展开▼
