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- Zhang, QilunLinköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten (author)
Understanding the Work Function Modification by a Self-assembled Polyvinylpyrrolidone Layer in Inverted Organic Solar Cells
- Article/chapterEnglish2021
Publisher, publication year, extent ...
- 2020-11-25
- Wiley-VCH Verlagsgesellschaft,2021
- electronicrdacarrier
Numbers
- LIBRIS-ID:oai:DiVA.org:liu-171935
- https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-171935URI
- https://doi.org/10.1002/solr.202000575DOI
Supplementary language notes
- Language:English
- Summary in:English
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- SwePubSwePub
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Notes
- Funding Agencies|Swedish Energy AgencySwedish Energy Agency [45411-1]; Swedish Research CouncilSwedish Research Council [2016-05498, 2016-05990]; STINT grant [CH2017-7163]; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University [2009 00971]; Wallenberg Wood Science Center (WWSC) [KAW 2018.0452]
- Polyvinylpyrrolidone (PVP) has been successfully used as the cathode interfacial layer (CIL) in organic solar cells (OSCs) for work function (W-F) modification. However, detailed insight into the effect of a PVP interlayer on the physicochemical properties of the indium tin oxide (ITO) electrode in inverted OSCs (I-OSCs) is still largely absent. Herein, the ITO/PVP interface is investigated by photoelectron spectroscopy and the mechanisms for the energy level alignment of PVP on different substrates in general are unraveled. The results indicate that the dipole formation that reduces the W-F is driven by not only the directional intrinsic molecular dipole moments associated with the gamma-lactam of PVP, but also an additional dipole step with the same direction created by the image charges in the contacting (semi-)conductor layer. In addition, high-performance inverted OSCs (I-OSCs) are achieved by introducing a self-assembled ultrathin PVP layer using a simple immersion method. This work provides enhanced understanding of the PVP-based CIL and demonstrates its great potential in I-OSC fabrication, which can pave the way to simplified manufacturing of low-cost and large-area devices in organic electronic technologies.
Subject headings and genre
- NATURVETENSKAP Kemi Materialkemi hsv//swe
- NATURAL SCIENCES Chemical Sciences Materials Chemistry hsv//eng
- double-dipole potential step
Added entries (persons, corporate bodies, meetings, titles ...)
- Wang, Chuan FeiLinköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten(Swepub:liu)chuwa55 (author)
- Liu, XianjieLinköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten(Swepub:liu)xiali21 (author)
- Fahlman, MatsLinköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten(Swepub:liu)matfa21 (author)
- Linköpings universitetLaboratoriet för organisk elektronik (creator_code:org_t)
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- In:Solar RRL: Wiley-VCH Verlagsgesellschaft5:12367-198X
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