Overcoming the Ambient Manufacturability-Scalability-Performance Bottleneck in Colloidal Quantum Dot Photovoltaics

Ahmad R. Kirmani, Arif D. Sheikh, Muhammad R. Niazi, Md Azimul Haque, Mengxia Liu, F. Pelayo García de Arquer, Jixian Xu, Bin Sun, Oleksandr Voznyy, Nicola Gasparini, Derya Baran, Tom Wu, Edward H. Sargent, Aram Amassian*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

80 Scopus citations

Abstract

Colloidal quantum dot (CQD) solar cells have risen rapidly in performance; however, their low-cost fabrication under realistic ambient conditions remains elusive. This study uncovers that humid environments curtail the power conversion efficiency (PCE) of solar cells by preventing the needed oxygen doping of the hole transporter during ambient fabrication. A simple oxygen-doping step enabling ambient manufacturing irrespective of seasonal humidity variations is devised. Solar cells with PCE > 10% are printed under high humidity at industrially viable speeds. The devices use a tiny fraction of the ink typically needed and are air stable over a year. The humidity-resilient fabrication of efficient CQD solar cells breaks a long-standing compromise, which should accelerate commercialization.

Original languageEnglish (US)
Article number1801661
JournalAdvanced Materials
Volume30
Issue number35
DOIs
StatePublished - Aug 29 2018

Keywords

  • blade coating
  • colloidal quantum dots
  • humidity
  • oxygen doping
  • solar cells

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering

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