Photovoltaic devices employing ternary PbSxTe1-x nanocrystals. Issue 5 (May 2017)

• Record Type: Journal Article
• Authors: Zhu, Xiangxiang; Liu, Zeke; Shi, Guozheng; Gu, Jinan; Wang, Weiwei; Ma, Wanli
• Is Part Of: Journal of materials science & technology. Volume 33:Issue 5(2017:May)
• Page Start: 418
• Page End: 423
• Publication Date: 2017-05
• Subjects: PbTe -- Colloidal quantum dots -- PbSxTe1-x -- Quantum dot solar cells -- Schottky solar cells; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2017.01.018
• Languages: English
• ISSNs: 1005-0302

Abstract

Abstract : Colloidal quantum dots (CQDs), especially lead chalcogenide CQDs, are regarded as promising materials for the next generation solar cells, due to their large absorption coefficient, excellent charge transport, and multiple exciton generation effect. We successfully synthesized highly-crystalline, monodispersed, well-alloyed PbS x Te1- x nanocrystals via a one-pot, hot injection reaction method. Energy-filtered transmission electron microscopy suggested that the S and Te anions were uniformly distributed in the alloy nanoparticles. The photovoltaic performance of CQD solar cells based on ternary PbS x Te1- x was reported for the first time. The photovoltaic devices using PbS x Te1- x were more efficient than either the pure PbS or the PbTe based devices. In addition, the PbS x Te1- x based devices showed a significantly improved stability than that of the PbTe based devices.