RETRACTED: Advances in colloidal quantum dot solar cells: The depleted-heterojunction device

Illan J. Kramer, Andras G. Pattantyus-Abraham, Aaron R. Barkhouse, Xihua Wang, Gerasimos Konstantatos, Ratan Debnath, Larissa Levina, Ines Raabe, Md. K. Nazeeruddin, Michael Grätzel, Edward H. Sargent

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Colloidal quantum dot (CQD) photovoltaics combine low-cost solution processibility with quantum size-effect tunability to match absorption with the solar spectrum. Recent advances in CQD photovoltaics have led to 3.6% AM1.5 solar power conversion efficiencies. Here we report CQD photovoltaic devices on transparent conductive oxides and show that our devices rely on the establishment of a depletion region for field-driven charge transport and separation. The resultant depleted-heterojunction solar cells provide a 5.1% AM1.5 power conversion efficiency. The devices employ infrared-bandgap size-effect-tuned PbS colloidal quantum dots, enabling broadband harvesting of the solar spectrum. © 2010 Elsevier B.V.
Original languageEnglish (US)
Pages (from-to)7351-7355
Number of pages5
JournalThin Solid Films
Volume519
Issue number21
DOIs
StatePublished - Aug 2011
Externally publishedYes

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