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Title: Electrospun Conjugated Polymer/Fullerene Hybrid Fibers: Photoactive Blends, Conductivity through Tunneling-AFM, Light Scattering, and Perspective for Their Use in Bulk-Heterojunction Organic Solar Cells

Hybrid conjugated polymer/fullerene filaments based on MEH-PPV/PVP/PCBM were prepared by electrospinning, and their properties were assessed by scanning electron, atomic and lateral-force, tunneling, and confocal microscopies, as well as by attenuated-total-reflection Fourier transform infrared spectroscopy, photoluminescence quantum yield, and spatially resolved fluorescence. Highlighted features include the ribbon shape of the realized fibers and the persistence of a network serving as a template for heterogeneous active layers in solar cell devices. A set of favorable characteristics is evidenced in this way in terms of homogeneous charge-transport behavior and formation of effective interfaces for diffusion and dissociation of photogenerated excitons. The interaction of the organic filaments with light, exhibiting specific light-scattering properties of the nanofibrous mat, might also contribute to spreading incident radiation across the active layers, thus potentially enhancing photovoltaic performance. Finally, this method might be applied to other electron donor–electron acceptor material systems for the fabrication of solar cell devices enhanced by nanofibrillar morphologies embedding conjugated polymers and fullerene compounds.
Authors:
 [1] ;  [2] ;  [1] ; ORCiD logo [1] ;  [2] ;  [2] ;  [3] ;  [4] ;  [4] ; ORCiD logo [5] ; ORCiD logo [6] ;  [7] ;  [1]
  1. Stony Brook Univ., NY (United States). Dept. of Materials Science and Engineering
  2. National Enterprise for NanoScience and NanoTechnology (NEST), Pisa (Italy)
  3. Univ. di Messina, Messina (Italy). Dipartimento di Scienze Matematiche e Informatiche, Scienze Fisiche e Scienze della Terra
  4. Istituto per i processi chimico-fisici (IPCF) Consiglio Nazionale Delle Ricerche (CNR), Messina (Italy)
  5. National Enterprise for NanoScience and NanoTechnology (NEST), Pisa (Italy); Univ. del Salento, via Arnesano, Lecce (Italy). Dipartimento di Matematica e Fisica "Ennio De Giorgi"
  6. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
  7. Technion-Israel Inst. of Technology, Haifa (Israel). Dept. of Mechanical Engineering
Publication Date:
Report Number(s):
BNL-203461-2018-JAAM
Journal ID: ISSN 1932-7447
Grant/Contract Number:
SC0012704
Type:
Accepted Manuscript
Journal Name:
Journal of Physical Chemistry. C
Additional Journal Information:
Journal Volume: 122; Journal Issue: 5; Journal ID: ISSN 1932-7447
Publisher:
American Chemical Society
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; Organic solar cells; nanofiber; bulk heterojunction
OSTI Identifier:
1431454