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Yu Kawano,Jakapan Chantana,Takashi Minemoto 한국물리학회 2015 Current Applied Physics Vol.15 No.8
Tin(II) sulfide (SnS) films are one of the most promising absorber materials for high efficiency solar cells without using rare metals. In this work, SnS films were deposited by the thermal evaporation on glass substrates under the variation of growth temperatures of 100-250 ℃. It was revealed that the SnS thin film prepared under the temperature of 100 ℃ had relatively small crystal grains. On the other hand, the denser and larger crystal grains of the SnS films were obtained with the constant compositions, when the growth temperature increased to 225 ℃. With the temperature of higher than 225 ℃, the SnS began to be re-evaporated from the films. The highest Hall mobility of the films was obtained under the temperature of 200 ℃. Ultimately, the results suggested that the optimized growth temperature of SnS by the evaporation is 200 ℃, giving rise to compact and large crystal grains and the highest Hall mobility, thereby contributing to the 2.53%-efficient SnS thin-film solar cell.
Takeguchi Kota,Chantana Jakapan,Nakayama Koichi,Kawano Yu,Nishimura Takahito,Hishikawa Yoshihiro,Minemoto Takashi 한국물리학회 2021 Current Applied Physics Vol.28 No.-
Spectral mismatch correction factor (MM) is determined by average photon energy (APE). APE based on wide solar spectral ranges leads to better description of solar spectral shape. Moreover, error between corrected outdoor short-circuit current (ISC) of PV module and its ISC under standard test conditions is investigated using PV module irradiance sensor (PVMS) and/or MM, where PVMS is a single-crystalline silicon PV module. The error of muti-crystalline silicon (mc-Si) PV module is as low as about 1% regardless of the use of MM attributed to small spectral mismatch between PVMS and mc-Si PV module. On the other hand, the low error of CdTe test PV module is obtained under the use of both PVMS and MM caused by the high spectral mismatch between PVMS and CdTe test PV module. The error is further decreased, when MM is estimated from the APE based on wide ranges of the solar spectrum.