Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 149, Issue -, Pages 15-18Publisher
ELSEVIER
DOI: 10.1016/j.solmat.2015.12.031
Keywords
Intermediate band solar cells; InGaAs/AlGaAs quantum dots; Two-photon photocurrent; Voltage preservation
Funding
- European Commission through the NGCPV Project [283798]
- Spanish Ministerio de Economia y Competitividad through the Project Promesa [ENE2012-37804-C02-01]
- Programme MADRID PV
- Comunidad de Madrid [S2013/MAE-2780]
- L'OREALUNESCO [SE14010B02]
- New Energy and Industrial Technology Development Organization (NEDO)
- Ministry of Economy, Trade and Industry (METI), Japan [08002149-0]
- Grants-in-Aid for Scientific Research [26246017] Funding Source: KAKEN
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In this work we report, for the first time at room temperature, experimental results that prove, simultaneously in the same device, the two main physical principles involved in the operation of intermediate band solar cells: (1) the production of sub-bandgap photocurrent by two optical transitions through the intermediate band; (2) the generation of an output voltage which is not limited by the photon energy absorption threshold. These principles, which had always required cryogenic temperatures to be evidenced all together, are now demonstrated at room temperature on an intermediate band solar cell based on InAs quantum dots with Al0.3Ga0.7As barriers. (C) 2016 Elsevier B.V. All rights reserved.
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