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

36 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

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Nanocrystals
Tin
Zinc
Copper
Ligands
Nanoparticles
Molecules
Poisons
Microstructural evolution
Solar cells
Lighting
Earth (planet)
Annealing
Semiconductor materials
Crystalline materials
Cracks
Costs
Sulfides
tin sulfide
Thin film solar cells

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

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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.",
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Highly concentrated synthesis of copper-zinc-tin-sulfide nanocrystals with easily decomposable capping molecules for printed photovoltaic applications. / Kim, Youngwoo; Woo, Kyoohee; Kim, Inhyuk; Cho, Yong Soo; Jeong, Sunho; Moon, Jooho.

In: Nanoscale, Vol. 5, No. 21, 07.11.2013, p. 10183-10188.

Research output: Contribution to journalArticle

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