Doping control via molecularly engineered surface ligand coordination

Mingjian Yuan, David Zhitomirsky, Valerio Adinolfi, Oleksandr Voznyy, Kyle W. Kemp, Zhijun Ning, Xinzheng Lan, Jixian Xu, Jin Young Kim, Haopeng Dong, Edward H. Sargent*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

54 Scopus citations

Abstract

A means to control the net doping of a CQD solid is identified via the design of the bidentate ligand crosslinking the material. The strategy does not rely on implementing different atmospheres at different steps in device processing, but instead is a robust strategy implemented in a single processing ambient. We achieve an order of magnitude difference in doping that allows us to build a graded photovoltaic device and maintain high current and voltage at maximum power-point conditions.

Original languageEnglish (US)
Pages (from-to)5586-5592
Number of pages7
JournalAdvanced Materials
Volume25
Issue number39
DOIs
StatePublished - Oct 18 2013

Keywords

  • colloidal quantum dots
  • depleted heterojunction
  • doping
  • photovoltaics
  • surface ligands

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • General Materials Science

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