Imperial College London
Portrait Picture

Professor James Durrant, CBE, FRS

Faculty of Natural Sciences, Department of Chemistry

Professor of Photochemistry
 
 
 
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Contact

 

+44 (0)20 7594 5321j.durrant Website

 
 
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Assistant

 

Miss Lisa Benbow +44 (0)20 7594 5883

 
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Location

 

G22CMolecular Sciences Research HubWhite City Campus

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Summary

 

Publications

Citation

BibTex format

@article{Daboczi:2020:10.1002/adfm.202001482,
author = {Daboczi, M and Kim, J and Lee, J and Kang, H and Hamilton, I and Lin, C-T and Dimitrov, SD and McLachlan, MA and Lee, K and Durrant, JR and Kim, J-S},
doi = {10.1002/adfm.202001482},
journal = {Advanced Functional Materials},
pages = {1--8},
title = {Towards efficient integrated perovskite/organic bulk heterojunction solar cells: interfacial energetic requirement to reduce charge carrier recombination losses},
url = {http://dx.doi.org/10.1002/adfm.202001482},
volume = {30},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Integrated perovskite/organic bulk heterojunction (BHJ) solar cells have the potential to enhance the efficiency of perovskite solar cells by a simple onestep deposition of an organic BHJ blend photoactive layer on top of the perovskite absorber. It is found that inverted structure integrated solar cells show significantly increased shortcircuit current (J sc) gained from the complementary absorption of the organic BHJ layer compared to the reference perovskiteonly devices. However, this increase in J sc is not directly reflected as an increase in power conversion efficiency of the devices due to a loss of fill factor. Herein, the origin of this efficiency loss is investigated. It is found that a significant energetic barrier (≈250 meV) exists at the perovskite/organic BHJ interface. This interfacial barrier prevents efficient transport of photogenerated charge carriers (holes) from the BHJ layer to the perovskite layer, leading to charge accumulation at the perovskite/BHJ interface. Such accumulation is found to cause undesirable recombination of charge carriers, lowering surface photovoltage of the photoactive layers and device efficiency via fill factor loss. The results highlight a critical role of the interfacial energetics in such integrated cells and provide useful guidelines for photoactive materials (both perovskite and organic semiconductors) required for highperformance devices.
AU  - Daboczi,M
AU  - Kim,J
AU  - Lee,J
AU  - Kang,H
AU  - Hamilton,I
AU  - Lin,C-T
AU  - Dimitrov,SD
AU  - McLachlan,MA
AU  - Lee,K
AU  - Durrant,JR
AU  - Kim,J-S
DO  - 10.1002/adfm.202001482
EP  - 8
PY  - 2020///
SN  - 1616-301X
SP  - 1
TI  - Towards efficient integrated perovskite/organic bulk heterojunction solar cells: interfacial energetic requirement to reduce charge carrier recombination losses
T2  - Advanced Functional Materials
UR  - http://dx.doi.org/10.1002/adfm.202001482
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000529148600001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://onlinelibrary.wiley.com/doi/full/10.1002/adfm.202001482
UR  - http://hdl.handle.net/10044/1/79326
VL  - 30
ER  -
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