کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8033105 1517966 2018 46 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Solution processed CuSbS2 films for solar cell applications
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Solution processed CuSbS2 films for solar cell applications
چکیده انگلیسی
CuSbS2 is a semiconductor with a band gap of 1.5 eV and earth-abundant constituent elements, indicating potential promise as a photovoltaic absorber material. However, strategies to fabricate CuSbS2 films, especially using solution processing, have not been thoroughly developed. We report on two solution-based approaches to deposit CuSbS2 films: chemical bath deposition (CBD) and deposition of colloidal nanoplates. Conditions to directly deposit ternary CuSbS2 (chalcostibite) films were not found, but CuSbS2 films could be formed by annealing CBD-grown bilayers of CuS and Sb2S3. Simultaneous control over phase purity and film morphology proved elusive. To address this challenge, we synthesized colloidal nanoplates of phase-pure chalcostibite CuSbS2 capped with oleylamine ligands following a literature procedure. When colloids are condensed into thin films, these synthesis ligands are insulating and inhibit the inter-crystal charge transfer that is necessary for long-range charge transport. To solve this problem, two approaches were pursued: convective assembly followed by solid-state ligand exchange and a novel process involving solution-phase ligand exchange followed by electrophoretic deposition (EPD). Replacement of oleylamine with S2− increased the film conductivity by two orders of magnitude. S2− capping groups also increased the electrophoretic mobility and enabled EPD at bias voltages as low as 5 V. Time-resolved terahertz spectroscopy indicated transient photoconductivity persisting beyond 1 ns and carrier mobilities of ~ 1 cm2 V−1 s−1. While many challenges remain, this work indicates the potential promise of solution-processed CuSbS2 nanoplates as building blocks for photovoltaic devices.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 646, 31 January 2018, Pages 180-189
نویسندگان
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