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

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


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)
Article number011106
JournalApplied Physics Letters
Issue number1
StatePublished - Jul 1 2013

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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