Imperial College London
Alternate

ProfessorJi-SeonKim

Faculty of Natural Sciences, Department of Physics

Professor of Solid State Physics
 
 
 
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Contact

 

+44 (0)20 7594 7597ji-seon.kim

 
 
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Location

 

B909Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Park:2022:10.1002/aenm.202103237,
author = {Park, SY and Labanti, C and Luke, J and Chin, YC and Kim, JS},
doi = {10.1002/aenm.202103237},
journal = {Advanced Energy Materials},
pages = {1--10},
title = {Organic bilayer photovoltaics for efficient indoor light harvesting},
url = {http://dx.doi.org/10.1002/aenm.202103237},
volume = {12},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Indoor organic photovoltaics (OPVs) are a potential niche application for organic semiconductors due to their strong and well-matched absorption with the emission of indoor lighting. However, due to extremely low photocurrent generation, the device parameters critical for efficient indoor OPVs differ from those under 1 Sun conditions. Herein, these critical device parameters—recombination loss and shunt resistance (Rsh)—are identified and it is demonstrated that bilayer OPVs are suitable for indoor PV applications. Compared to bulk-heterojunction (BHJ), the open-circuit voltage loss of bilayer devices under low light intensities is much smaller, consistent with a larger surface photovoltage response, indicating suppressed recombination losses. The bilayer devices show a higher fill factor at low light intensities, resulting from high Rsh afforded by the ideal interfacial contacts between the photoactive and the charge transport layers. The high Rsh enables bilayer devices to perform well without a light-soaking process. Finally, the charge carriers are extracted rapidly in bilayers, which are attributed to strongly suppressed trap states possibly induced by isolated domains and non-ideal interfacial contacts in BHJs. This study highlights the excellent suitability of bilayer OPVs for indoor applications and demonstrates the importance of device architecture and interfacial structures for efficient indoor OPVs.
AU  - Park,SY
AU  - Labanti,C
AU  - Luke,J
AU  - Chin,YC
AU  - Kim,JS
DO  - 10.1002/aenm.202103237
EP  - 10
PY  - 2022///
SN  - 1614-6832
SP  - 1
TI  - Organic bilayer photovoltaics for efficient indoor light harvesting
T2  - Advanced Energy Materials
UR  - http://dx.doi.org/10.1002/aenm.202103237
UR  - https://onlinelibrary.wiley.com/doi/10.1002/aenm.202103237
UR  - http://hdl.handle.net/10044/1/93179
VL  - 12
ER  -
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