Alkali assisted enhancement of CZTS absorber layer characteristics
Photovoltaic Specialists Conference(2011)
摘要
CZTS (Copper Zinc Tin Sulphide) is a quartnery semiconductor consisting of elements which are abundantly available in nature and are completely non-toxic. Moreover it has a band gap of about 1.5 eV and an absorption coefficient of 104 cm-1, making it an ideal material to be used as an absorber layer in solar cells. In the present work, CZTS thin films were grown by Ultrasonic Spray Pyrolysis on two different substrates; soda lime glass and borosilicate glass. Sodium was found to diffuse from the substrate into the film due to high growth temperatures. The crystallite size and electrical conductivity enhanced as a consequence of this alkali penetration into the films. The results are presented in this paper.
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关键词
energy gap,glass,pyrolysis,semiconductor quantum wells,semiconductor thin films,solar cells,tin compounds,zinc compounds,czts thin films,absorber layer characteristics,absorption coefficient,alkali assisted enhancement,band gap,borosilicate glass,copper zinc tin sulphide,crystallite size,electrical conductivity,electron volt energy 1.5 ev,high growth temperatures,quartnery semiconductor,soda lime glass,ultrasonic spray pyrolysis,acoustics,conductivity,thin film,films,zinc,electric conductivity,copper
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