Resonance Energy Transfer from PbS colloidal quantum dots to bulk silicon: The road to hybrid photovoltaics

P. Andreakou, M. Brossard, M. Bernechea, G. Konstantatos, P. Lagoudakis

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

9 Citations (Scopus)

Abstract

Semiconductor Quantum Dots (QDs) are promising materials for photovoltaic applications because they can be engineered to absorb light from visible to near infrared and single absorbed photons can generate multiple excitons. However, these materials suffer from low carrier mobility, which severely limits the prospects of efficient charge extraction and carrier transport. We take advantage of the optical properties of QDs and overcome their drawback by using a hybrid photovoltaic device. This photovoltaic configuration exploits the absorption of solar photons in the QDs and the transfer of excitons from the QDs to a silicon p-n junction. We study the Resonance Energy Transfer (RET) mechanism to inject excitons from the QDs into the depletion layer of a silicon p-n junction. Lead sulphide (PbS) nanocrystals are deposited onto the silicon substrate and the efficiency of Resonance Energy Transfer (RET) from the PbS nanoparticles to bulk silicon is investigated. We study the efficiency of this transfer channel between the PbS nanocrystals and silicon by varying their separation distance. These results demonstrate RET from colloidal quantum dots to bulk silicon. Temperature measurements are also presented and show that the RET efficiency is as high as 44% at room temperature. Such a hybrid photovoltaic device makes a potentially inexpensive scheme for achieving high-efficiency and low-cost solar-cell platforms.

Original languageEnglish
Title of host publicationPhysics, Simulation, and Photonic Engineering of Photovoltaic Devices
Volume8256
DOIs
Publication statusPublished - 2012
Externally publishedYes
EventPhysics, Simulation, and Photonic Engineering of Photovoltaic Devices - San Francisco, CA, United States
Duration: 23 Jan 201226 Jan 2012

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8256
ISSN (Print)0277-786X

Conference

ConferencePhysics, Simulation, and Photonic Engineering of Photovoltaic Devices
Country/TerritoryUnited States
CitySan Francisco, CA
Period23/01/1226/01/12

Keywords

  • Energy transfer
  • Hybrid photovoltaics
  • Lead sulfide
  • Quantum Dots
  • Silicon

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