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Photovoltage Genera...
Photovoltage Generation across Different Interfaces in a PbS QuantumDot Solar Cell Investigated by Time-Resolved PhotoelectronSpectroscopy
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- Sloboda, Tamara (author)
- KTH,Tillämpad fysikalisk kemi
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- Kammlander, Birgit (author)
- KTH,Tillämpad fysikalisk kemi
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- Berggren, Elin (author)
- Division of X-ray Photon Science, Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20, Uppsala, Sweden
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- Riva, Stefania (author)
- Division of X-ray Photon Science, Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20, Uppsala, Sweden
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- Giangrisostomi, Erika (author)
- Institute Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin GmbH, Albert-Einstein- Straße 15, 12489 Berlin, Germany
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- Ovsyannikov, Ruslan (author)
- Institute Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin GmbH, Albert-Einstein- Straße 15, 12489 Berlin, Germany
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- Rensmo, Håkan (author)
- Division of X-ray Photon Science, Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20, Uppsala, Sweden
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- Lindblad, Andreas (author)
- Division of X-ray Photon Science, Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20, Uppsala, Sweden
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- Cappel, Ute B. (author)
- KTH,Tillämpad fysikalisk kemi
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(creator_code:org_t)
- English.
- Related links:
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https://urn.kb.se/re...
Abstract
Subject headings
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- Quantum dot solar cells have not yet achieved optimal device performances and to direct development there is thereforea need to understand the device function of present solar cell structures in more detail. Understanding where photovoltage isgenerated in a device and where energy losses occur is a key aspect of this. We have previously shown that time-resolved core levelphotoelectron spectroscopy can be used to follow the photovoltage rise and decay at a specific interface from pico- to microsecondtimescales. Here, we extend this study and investigate the photovoltage generation in different parts of a PbS quantum dot solar cellthrough sample design. We show that thick absorbing quantum dot layers are required for generating a high photovoltage at theinterface between n-type PbS quantum dots and p-type quantum dots. Furthermore, we show that the full photovoltage is only generatedwhen a gold contact is deposited on the quantum dots and that the presence of this contact also leads to significantly slowercharge recombination.
Subject headings
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
Publication and Content Type
- vet (subject category)
- ovr (subject category)
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