Highly concentrated synthesis of copper-zinc-tin-sulfide nanocrystals with easily decomposable capping molecules for printed photovoltaic applications

Youngwoo Kim, Kyoohee Woo, Inhyuk Kim, Yong Soo Cho, Sunho Jeong, Jooho Moon

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

Among various candidate materials, Cu2ZnSnS4 (CZTS) is a promising earth-abundant semiconductor for low-cost thin film solar cells. We report a facile, less toxic, highly concentrated synthetic method utilizing the heretofore unrecognized, easily decomposable capping ligand of triphenylphosphate, where phase-pure, single-crystalline, and well-dispersed colloidal CZTS nanocrystals were obtained. The favorable influence of the easily decomposable capping ligand on the microstructural evolution of device-quality CZTS absorber layers was clarified based on a comparative study with commonly used oleylamine-capped CZTS nanoparticles. The resulting CZTS nanoparticles enabled us to produce a dense and crack-free absorbing layer through annealing under a N2 + H2S (4%) atmosphere, demonstrating a solar cell with an efficiency of 3.6% under AM 1.5 illumination.

Original languageEnglish
Pages (from-to)10183-10188
Number of pages6
JournalNanoscale
Volume5
Issue number21
DOIs
Publication statusPublished - 2013 Nov 7

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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