期刊
NANO ENERGY
卷 94, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2022.106923
关键词
Copper phosphotungstate; Anode interfacial layer; Non-halogenated solvent; Organic photovoltaics; Organic light-emitting diodes
类别
资金
- National Natural Science Foundation of China [21905137, 51961165102]
- Research Grants Council of Hong Kong [15221320, C5037-18G]
- Guangdong-Hong Kong-Macao Joint Labora-tory for Photonic-Thermal-Electrical Energy Materials and Devices (GDSTC) [2019B121205001]
- Hong Kong Polytechnic University [8-8480]
- Hong Kong Scholar Program [XJ2020042]
In this work, a low cost, methanol processed copper phosphotungstate (Cu003) is developed as anode interfacial layers (AIL) for organic photovoltaics (OPVs) and organic light-emitting diodes (OLEDs). The Cu003 AIL exhibits superior stability, higher transmittance, and carrier extraction capacity compared to PEDOT:PSS, resulting in improved performance of OPVs and OLEDs. The devices incorporating Cu003 AIL achieve high efficiencies and fill factors.
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 x 10(-4) cm(2) 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.
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