TY - JOUR
T1 - Copper phosphotungstate as low cost, solution-processed, stable inorganic anode interfacial material enables organic photovoltaics with over 18% efficiency
AU - Yu, Jiangsheng
AU - Liu, Xin
AU - Zhong, Ziping
AU - Yan, Cenqi
AU - Liu, Heng
AU - Fong, Patrick W.K.
AU - Liang, Qiong
AU - Lu, Xinhui
AU - Li, Gang
N1 - Funding Information:
The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (Grant nos. 21905137, 51961165102 ), Research Grants Council of Hong Kong (Project nos. 15221320, C5037-18G ), Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices (GDSTC no. 2019B121205001), and Mechanism Studies ), and Hong Kong Polytechnic University ( 8-8480, CDA5 ). J. Yu thanks the support from the Hong Kong Scholar Program ( XJ2020042 ).
Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/4
Y1 - 2022/4
N2 - The performance and lifespan of organic photovoltaics (OPVs) and organic light-emitting diodes (OLEDs) are highly dependent on the properties of anode interfacial layers (AILs). In this work, a low cost, methanol processed copper phosphotungstate (Cu003) as AIL is developed for OPVs and OLEDs. The Cu003 film features an optical bandgap of 3.9 eV, a work function of 5.08 eV, and a hole mobility of 9.78 × 10-4 cm2 V-1 s-1. Cu003 AIL exhibits superior stability, higher transmittance and carrier extraction capacity than PEDOT:PSS, and induces better optoelectronic field intensity distribution, contributing to exciton generation and recombination inhibition. Therefore, non-halogenated solvent processed OPVs incorporating Cu003 AIL and PM6:BTPBO-4Cl active layer afford a high efficiency of 17.6%, with an outstanding fill factor of 79.6%, exceeding those with PEDOT:PSS. Moreover, the device based on Cu003/PM6:BTP-eC9:PC71BM affords a remarkable efficiency of 18.2%. The flexible OPVs and OLEDs incorporating Cu003 AIL are also successfully demonstrated. Our research shows that the inorganic Cu003 AIL is stable, low-cost, ecologically friendly, and facile-processing for organic electronics.
AB - The performance and lifespan of organic photovoltaics (OPVs) and organic light-emitting diodes (OLEDs) are highly dependent on the properties of anode interfacial layers (AILs). In this work, a low cost, methanol processed copper phosphotungstate (Cu003) as AIL is developed for OPVs and OLEDs. The Cu003 film features an optical bandgap of 3.9 eV, a work function of 5.08 eV, and a hole mobility of 9.78 × 10-4 cm2 V-1 s-1. Cu003 AIL exhibits superior stability, higher transmittance and carrier extraction capacity than PEDOT:PSS, and induces better optoelectronic field intensity distribution, contributing to exciton generation and recombination inhibition. Therefore, non-halogenated solvent processed OPVs incorporating Cu003 AIL and PM6:BTPBO-4Cl active layer afford a high efficiency of 17.6%, with an outstanding fill factor of 79.6%, exceeding those with PEDOT:PSS. Moreover, the device based on Cu003/PM6:BTP-eC9:PC71BM affords a remarkable efficiency of 18.2%. The flexible OPVs and OLEDs incorporating Cu003 AIL are also successfully demonstrated. Our research shows that the inorganic Cu003 AIL is stable, low-cost, ecologically friendly, and facile-processing for organic electronics.
KW - Anode interfacial layer
KW - Copper phosphotungstate
KW - Non-halogenated solvent
KW - Organic light-emitting diodes
KW - Organic photovoltaics
UR - http://www.scopus.com/inward/record.url?scp=85122541363&partnerID=8YFLogxK
U2 - 10.1016/j.nanoen.2022.106923
DO - 10.1016/j.nanoen.2022.106923
M3 - Journal article
AN - SCOPUS:85122541363
SN - 2211-2855
VL - 94
SP - 1
EP - 8
JO - Nano Energy
JF - Nano Energy
M1 - 106923
ER -
