Effect of ZnO Electron Extraction Layer on Charge Recombination and Collection Properties in Organic Solar Cells

Weixia Lan; Yang Liu; Bo Wu; Bin Xu; Huayan Pu; Bin Wei; Yan Peng; Wenjing Tian; Fu Rong Zhu

doi:10.1021/acsaem.9b01383

Effect of ZnO Electron Extraction Layer on Charge Recombination and Collection Properties in Organic Solar Cells

Weixia Lan
, Yang Liu
, Bo Wu
, Bin Xu
, Huayan Pu
, Bin Wei
, Yan Peng^*
, Wenjing Tian
, Fu Rong Zhu

^*Corresponding author for this work

Research output: Contribution to journal › Journal article › peer-review

32 Citations (Scopus)

75 Downloads (Pure)

Abstract

The effect of zinc oxide (ZnO) electron extraction layer (EEL) on charge recombination and collection properties in bulk-heterojunction (BHJ) organic solar cells (OSCs), based on a poly[[4,8-bis[(2-ethylhexyl)oxy] benzo [1,2-b:4,5-b′] dithiophene-2,6- diyl] [3-fluoro-2-[(2-ethylhexyl)carbonyl] thieno [3,4-b] thiophenediyl]] (PTB7):3′H-cyclopropa[8,25] [5,6]fullerene-C70-D5h(6)-3′-butanoicacid, 3′-phenyl-, methyl ester (PC₇₀BM) blend system, has been analyzed using the transient photocurrent (TPC) and photoinduced charge extraction by linearly increasing voltage (photo-CELIV) measurements. The TPC and photo-CELIV results indicate that the trap-limited bimolecular recombination can be strongly suppressed by interposing a 20 nm thick ZnO EEL between the BHJ and cathode, leading to a 9.4% increase in power conversion efficiency. The presence of ZnO EEL is beneficial in efficient operation of OSCs in two ways: (1) suppressing trap-limited bimolecular recombination and (2) enhancing the charge collection at the organic/cathode interface.

Original language	English
Pages (from-to)	7385-7392
Number of pages	8
Journal	ACS Applied Energy Materials
Volume	2
Issue number	10
DOIs	https://doi.org/10.1021/acsaem.9b01383
Publication status	Published - 28 Oct 2019

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

User-Defined Keywords

charge collection
charge recombination
electron extraction layer
organic solar cells
photo-CELIV

Access to Document

10.1021/acsaem.9b01383

Full TextAccepted author manuscript, 783 KB

Cite this

@article{3b77888a3e454e9a81b00c06e3c87243,

title = "Effect of ZnO Electron Extraction Layer on Charge Recombination and Collection Properties in Organic Solar Cells",

abstract = "The effect of zinc oxide (ZnO) electron extraction layer (EEL) on charge recombination and collection properties in bulk-heterojunction (BHJ) organic solar cells (OSCs), based on a poly[[4,8-bis[(2-ethylhexyl)oxy] benzo [1,2-b:4,5-b′] dithiophene-2,6- diyl] [3-fluoro-2-[(2-ethylhexyl)carbonyl] thieno [3,4-b] thiophenediyl]] (PTB7):3′H-cyclopropa[8,25] [5,6]fullerene-C70-D5h(6)-3′-butanoicacid, 3′-phenyl-, methyl ester (PC70BM) blend system, has been analyzed using the transient photocurrent (TPC) and photoinduced charge extraction by linearly increasing voltage (photo-CELIV) measurements. The TPC and photo-CELIV results indicate that the trap-limited bimolecular recombination can be strongly suppressed by interposing a 20 nm thick ZnO EEL between the BHJ and cathode, leading to a 9.4\% increase in power conversion efficiency. The presence of ZnO EEL is beneficial in efficient operation of OSCs in two ways: (1) suppressing trap-limited bimolecular recombination and (2) enhancing the charge collection at the organic/cathode interface.",

keywords = "charge collection, charge recombination, electron extraction layer, organic solar cells, photo-CELIV",

author = "Weixia Lan and Yang Liu and Bo Wu and Bin Xu and Huayan Pu and Bin Wei and Yan Peng and Wenjing Tian and Zhu, \{Fu Rong\}",

note = "Funding Information: The work was supported by the Research Grants Council, University Grants Committee of Hong Kong Special Administrative Region, China, General Research Fund (GRF/12302419), Collaborative Research Fund (C5037-18GF), Hong Kong Baptist University Interinstitutional Collaborative Research Scheme (RC-ICRS/15-16/04), National Science Foundation of China (61827812 and 91648119), 973 Program (2014CB643506), and Program for Changbaishan Scholars of Jilin Province, China.",

year = "2019",

month = oct,

day = "28",

doi = "10.1021/acsaem.9b01383",

language = "English",

volume = "2",

pages = "7385--7392",

journal = "ACS Applied Energy Materials",

issn = "2574-0962",

publisher = "American Chemical Society",

number = "10",

}

TY - JOUR

T1 - Effect of ZnO Electron Extraction Layer on Charge Recombination and Collection Properties in Organic Solar Cells

AU - Lan, Weixia

AU - Liu, Yang

AU - Wu, Bo

AU - Xu, Bin

AU - Pu, Huayan

AU - Wei, Bin

AU - Peng, Yan

AU - Tian, Wenjing

AU - Zhu, Fu Rong

N1 - Funding Information: The work was supported by the Research Grants Council, University Grants Committee of Hong Kong Special Administrative Region, China, General Research Fund (GRF/12302419), Collaborative Research Fund (C5037-18GF), Hong Kong Baptist University Interinstitutional Collaborative Research Scheme (RC-ICRS/15-16/04), National Science Foundation of China (61827812 and 91648119), 973 Program (2014CB643506), and Program for Changbaishan Scholars of Jilin Province, China.

PY - 2019/10/28

Y1 - 2019/10/28

N2 - The effect of zinc oxide (ZnO) electron extraction layer (EEL) on charge recombination and collection properties in bulk-heterojunction (BHJ) organic solar cells (OSCs), based on a poly[[4,8-bis[(2-ethylhexyl)oxy] benzo [1,2-b:4,5-b′] dithiophene-2,6- diyl] [3-fluoro-2-[(2-ethylhexyl)carbonyl] thieno [3,4-b] thiophenediyl]] (PTB7):3′H-cyclopropa[8,25] [5,6]fullerene-C70-D5h(6)-3′-butanoicacid, 3′-phenyl-, methyl ester (PC70BM) blend system, has been analyzed using the transient photocurrent (TPC) and photoinduced charge extraction by linearly increasing voltage (photo-CELIV) measurements. The TPC and photo-CELIV results indicate that the trap-limited bimolecular recombination can be strongly suppressed by interposing a 20 nm thick ZnO EEL between the BHJ and cathode, leading to a 9.4% increase in power conversion efficiency. The presence of ZnO EEL is beneficial in efficient operation of OSCs in two ways: (1) suppressing trap-limited bimolecular recombination and (2) enhancing the charge collection at the organic/cathode interface.

AB - The effect of zinc oxide (ZnO) electron extraction layer (EEL) on charge recombination and collection properties in bulk-heterojunction (BHJ) organic solar cells (OSCs), based on a poly[[4,8-bis[(2-ethylhexyl)oxy] benzo [1,2-b:4,5-b′] dithiophene-2,6- diyl] [3-fluoro-2-[(2-ethylhexyl)carbonyl] thieno [3,4-b] thiophenediyl]] (PTB7):3′H-cyclopropa[8,25] [5,6]fullerene-C70-D5h(6)-3′-butanoicacid, 3′-phenyl-, methyl ester (PC70BM) blend system, has been analyzed using the transient photocurrent (TPC) and photoinduced charge extraction by linearly increasing voltage (photo-CELIV) measurements. The TPC and photo-CELIV results indicate that the trap-limited bimolecular recombination can be strongly suppressed by interposing a 20 nm thick ZnO EEL between the BHJ and cathode, leading to a 9.4% increase in power conversion efficiency. The presence of ZnO EEL is beneficial in efficient operation of OSCs in two ways: (1) suppressing trap-limited bimolecular recombination and (2) enhancing the charge collection at the organic/cathode interface.

KW - charge collection

KW - charge recombination

KW - electron extraction layer

KW - organic solar cells

KW - photo-CELIV

UR - https://www.scopus.com/pages/publications/85073144089

U2 - 10.1021/acsaem.9b01383

DO - 10.1021/acsaem.9b01383

M3 - Journal article

AN - SCOPUS:85073144089

SN - 2574-0962

VL - 2

SP - 7385

EP - 7392

JO - ACS Applied Energy Materials

JF - ACS Applied Energy Materials

IS - 10

ER -

Effect of ZnO Electron Extraction Layer on Charge Recombination and Collection Properties in Organic Solar Cells

Abstract

UN SDGs

User-Defined Keywords

Access to Document

Other files and links

Fingerprint

Cite this