Dimmock, JAR;
Kauer, M;
Wu, J;
Liu, H;
Stavrinou, PN;
Ekins-Daukes, NJ;
(2019)
A metallic hot-carrier photovoltaic device.
Semiconductor Science and Technology
, 34
(6)
, Article 064001. 10.1088/1361-6641/ab1222.
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Abstract
Hot carrier solar cells overcome the fundamental limitations of conventional devices where charge carriers are photogenerated over a broad energy spectrum but rapidly lose energy to the lattice and are extracted at the lowest energy of the system. In a hot carrier photovoltaic cell, carriers are extracted at higher energies than the absorption threshold, and extraction proceeds sufficiently quickly to avoid dissipative energy loss. We demonstrate a new hot carrier photovoltaic device where a broad spectrum of light is absorbed in metallic layers tens of nanometers thick. Using a semiconductor quantum well resonant tunnel structure we demonstrate energy selective hot carrier extraction from the metal film and show a unique hot carrier signature in the device IV characteristics. Using a multiple beam experiment, we further prove that these carriers arise from a hot electron population rather than via internal photoemission; a necessary requirement for high efficiency photovoltaic operation.
| Type: | Article |
|---|---|
| Title: | A metallic hot-carrier photovoltaic device |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/1361-6641/ab1222 |
| Publisher version: | https://doi.org/10.1088/1361-6641/ab1222 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | hot carrier, photovoltaic, solar cell, metal absorption |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10081186 |
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