Organic solar cells are promising in terms of full-solution-processing which enables low-cost and large-scale fabrication. While single-junction solar cells have seen a boost in power conversion efficiency (PCE), multi-junction solar cells are promising to further enhance the PCE. In all-solution-processed multi-junction solar cells, interfacial losses are often encountered between hole-transporting layer (HTL) and the active layers and therefore greatly limit the application of newly developed high-performance donor and acceptor materials in multi-junction solar cells. Here, the authors report on a systematic study of interface losses in both single-junction and multi-junction solar cells based on representative polymer donors and HTLs using electron spectroscopy and time-of-flight secondary ion mass spectrometry. It is found that a facile mixed HTL containing poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) and MoO
x
nanoparticles successfully overcomes the interfacial losses in both single- and multi-junction solar cells based on various active layers by reducing interface protonation, promoting better energy-level alignment, and forming a dense and smooth layer. Solution-processed single-junction solar cells are demonstrated to reach the same performance as with evaporated MoO
x
(over 7%). Multi-junction solar cells with polymers containing nitrogen atoms as the first layer and the mixed PEDOT:PSS and MoO
x
nanoparticles as hole extraction layer reach fill factor (FF) of over 60%, and PCE of over 8%, while the identical stack with pristine PEDOT:PSS or MoO
x
nanoparticles show FF smaller than 50% and PCE less than 5%.
Description
Overcoming Interfacial Losses in Solution-Processed Organic Multi-Junction Solar Cells - Du - 2016 - Advanced Energy Materials - Wiley Online Library
%0 Journal Article
%1 AENM:AENM201601959
%A Du, Xiaoyan
%A Lytken, Ole
%A Killian, Manuela S.
%A Cao, Jiamin
%A Stubhan, Tobias
%A Turbiez, Mathieu
%A Schmuki, Patrik
%A Steinrück, Hans-Peter
%A Ding, Liming
%A Fink, Rainer H.
%A Li, Ning
%A Brabec, Christoph J.
%D 2016
%J Advanced Energy Materials
%K interfaces optimisation organic
%P n/a--n/a
%R 10.1002/aenm.201601959
%T Overcoming Interfacial Losses in Solution-Processed Organic Multi-Junction Solar Cells
%U http://dx.doi.org/10.1002/aenm.201601959
%X Organic solar cells are promising in terms of full-solution-processing which enables low-cost and large-scale fabrication. While single-junction solar cells have seen a boost in power conversion efficiency (PCE), multi-junction solar cells are promising to further enhance the PCE. In all-solution-processed multi-junction solar cells, interfacial losses are often encountered between hole-transporting layer (HTL) and the active layers and therefore greatly limit the application of newly developed high-performance donor and acceptor materials in multi-junction solar cells. Here, the authors report on a systematic study of interface losses in both single-junction and multi-junction solar cells based on representative polymer donors and HTLs using electron spectroscopy and time-of-flight secondary ion mass spectrometry. It is found that a facile mixed HTL containing poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) and MoO
x
nanoparticles successfully overcomes the interfacial losses in both single- and multi-junction solar cells based on various active layers by reducing interface protonation, promoting better energy-level alignment, and forming a dense and smooth layer. Solution-processed single-junction solar cells are demonstrated to reach the same performance as with evaporated MoO
x
(over 7%). Multi-junction solar cells with polymers containing nitrogen atoms as the first layer and the mixed PEDOT:PSS and MoO
x
nanoparticles as hole extraction layer reach fill factor (FF) of over 60%, and PCE of over 8%, while the identical stack with pristine PEDOT:PSS or MoO
x
nanoparticles show FF smaller than 50% and PCE less than 5%.
@article{AENM:AENM201601959,
abstract = {Organic solar cells are promising in terms of full-solution-processing which enables low-cost and large-scale fabrication. While single-junction solar cells have seen a boost in power conversion efficiency (PCE), multi-junction solar cells are promising to further enhance the PCE. In all-solution-processed multi-junction solar cells, interfacial losses are often encountered between hole-transporting layer (HTL) and the active layers and therefore greatly limit the application of newly developed high-performance donor and acceptor materials in multi-junction solar cells. Here, the authors report on a systematic study of interface losses in both single-junction and multi-junction solar cells based on representative polymer donors and HTLs using electron spectroscopy and time-of-flight secondary ion mass spectrometry. It is found that a facile mixed HTL containing poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) and MoO
x
nanoparticles successfully overcomes the interfacial losses in both single- and multi-junction solar cells based on various active layers by reducing interface protonation, promoting better energy-level alignment, and forming a dense and smooth layer. Solution-processed single-junction solar cells are demonstrated to reach the same performance as with evaporated MoO
x
(over 7%). Multi-junction solar cells with polymers containing nitrogen atoms as the first layer and the mixed PEDOT:PSS and MoO
x
nanoparticles as hole extraction layer reach fill factor (FF) of over 60%, and PCE of over 8%, while the identical stack with pristine PEDOT:PSS or MoO
x
nanoparticles show FF smaller than 50% and PCE less than 5%.},
added-at = {2016-11-24T10:53:25.000+0100},
author = {Du, Xiaoyan and Lytken, Ole and Killian, Manuela S. and Cao, Jiamin and Stubhan, Tobias and Turbiez, Mathieu and Schmuki, Patrik and Steinrück, Hans-Peter and Ding, Liming and Fink, Rainer H. and Li, Ning and Brabec, Christoph J.},
biburl = {https://www.bibsonomy.org/bibtex/23c507152f4b7d079a0953d9bdcf7a734/bretschneider_m},
description = {Overcoming Interfacial Losses in Solution-Processed Organic Multi-Junction Solar Cells - Du - 2016 - Advanced Energy Materials - Wiley Online Library},
doi = {10.1002/aenm.201601959},
interhash = {bb03bab90316f1c72e2e1233bdae2d41},
intrahash = {3c507152f4b7d079a0953d9bdcf7a734},
issn = {1614-6840},
journal = {Advanced Energy Materials},
keywords = {interfaces optimisation organic},
pages = {n/a--n/a},
timestamp = {2016-11-24T10:53:25.000+0100},
title = {Overcoming Interfacial Losses in Solution-Processed Organic Multi-Junction Solar Cells},
url = {http://dx.doi.org/10.1002/aenm.201601959},
year = 2016
}