Kesterite Inorganic-Organic Heterojunction for Solution Processable Solar Cells

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• 作者：P. Data^a ; ^b ; ^c ; ¹ ; ^{Przemyslaw.Data@dur.ac.uk" class="auth_mail" title="E-mail the corresponding author} ; M. Bialoglowski^d ; K. Lyzwa^d ; R. Bacewicz^e ; P. Dluzewski^f ; M. Lapkowski^b ; ^c ; T. Gregorkiewicz^g ; S. Podsiadlo^d ; A.P. Monkman^a
• 关键词：solar cells ; kesterite ; P3HT ; phenoxazine ; electrochemistry
• 刊名：Electrochimica Acta
• 出版年：2016
• 出版时间：20 May 2016
• 年：2016
• 卷：201
• 期：Complete
• 页码：78-85
• 全文大小：1869 K

文摘

New synthesis of solution processable kesterite and kesterite-phenoxazine nanopowders were presented. The direct band-gap semiconductor Cu₂ZnSnS₄ has attracted the attention of many due to its large absorption coefficient (α > 10⁴ cm⁻¹) and (optical) band-gap energy close to the optimal value for solar light conversion (1.4–1.6 eV). The presence of a kesterite nanocrystal structure has been investigated and confirmed by (HR)TEM, X-ray powder diffraction, EDX and EXAFS measurements. Low-temperature photoluminescence (PL) measurements indicate the absence of PL in the Cu₂ZnSnS₄ nanocrystals. Electrochemical studies helped to prove that an inorganic-organic heterojunction of nanokesterite-phenoxazine was obtained. Device studies showed a two fold improvement in efficiency upon addition of a kesterite or phenoxazines-kesterite layer.