Depleted-heterojunction colloidal quantum dot photovoltaics employing low-cost electrical contacts

作者：Debnath Ratan; Greiner Mark T; Kramer Illan J; Fischer Armin; Tang Jiang; Barkhouse D Aaron R; Wang Xihua; Levina Larissa; Lu Zheng Hong; Sargent Edward H^*

来源：Applied Physics Letters, 2010, 97(2): 023109.

DOI：10.1063/1.3463037

• excitons
• III-V semiconductors
• indium compounds
• nanowires
• photoluminescence
• semiconductor quantum wires
• time resolved spectra
• valence bands

With an aim to reduce the cost of depleted-heterojunction colloidal quantum dot solar cells, we describe herein a strategy that replaces costly Au with a low-cost Ni-based Ohmic contact. The resultant devices achieve 3.5% Air Mass 1.5 power conversion efficiency. Only by incorporating a 1.2-nm-thick LiF layer between the PbS quantum dot film and Ni, we were able to prevent undesired reactions and degradation at the metal-semiconductor interface.

• 出版日期2010-7-12
• 单位云南大学