Electric field engineering using quantum-size-effect-tuned heterojunctions

V. Adinolfi, Z. Ning, J. Xu, Silvia Masala, D. Zhitomirsky, S. M. Thon, E. H. Sargent

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

A quantum junction solar cell architecture was recently reported that employs colloidal quantum dots (CQDs) on each side of the p-n junction. This architecture extends the range of design opportunities for CQD photovoltaics, since the bandgap can be tuned across the light-absorbing semiconductor layer via control over CQD size, employing solution-processed, room-temperature fabricated materials. We exploit this feature by designing and demonstrating a field-enhanced heterojunction architecture. We optimize the electric field profile within the solar cell through bandgap engineering, thereby improving carrier collection and achieving an increased open circuit voltage, resulting in a 12% improvement in power conversion efficiency.
Original languageEnglish (US)
Pages (from-to)011106
JournalApplied Physics Letters
Volume103
Issue number1
DOIs
StatePublished - Jul 4 2013

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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