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Reticulated Organic Photovoltaics
Author(s) -
Schiros Theanne,
Mannsfeld Stefan,
Chiu Chienyang,
Yager Kevin G.,
Ciston James,
Gorodetsky Alon A.,
Palma Matteo,
Bullard Zac,
Kramer Theodore,
Delongchamp Dean,
Fischer Daniel,
Kymissis Ioannis,
Toney Michael F.,
Nuckolls Colin
Publication year - 2012
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201102572
Subject(s) - materials science , x ray photoelectron spectroscopy , organic solar cell , heterojunction , photovoltaics , photovoltaic system , nanotechnology , optoelectronics , fabrication , polymer solar cell , energy conversion efficiency , chemical engineering , polymer , composite material , ecology , alternative medicine , pathology , engineering , medicine , biology
This paper shows how the self‐assembled interlocking of two nanostructured materials can lead to increased photovoltaic performance. A detailed picture of the reticulated 6‐DBTTC/C 60 organic photovoltaic (OPV) heterojunction, which produces devices approaching the theoretical maximum for these materials, is presented from near edge X‐ray absorption spectroscopy (NEXAFS), X‐ray photoelectron spectroscopy (XPS), Grazing Incidence X‐ray diffraction (GIXD) and transmission electron microscopy (TEM). The complementary suite of techniques shows how self‐assembly can be exploited to engineer the interface and morphology between the cables of donor (6‐DBTTC) material and a polycrystalline acceptor (C 60 ) to create an interpenetrating network of pure phases expected to be optimal for OPV device design. Moreover, we find that there is also a structural and electronic interaction between the two materials at the molecular interface. The data show how molecular self‐assembly can facilitate 3‐D nanostructured photovoltaic cells that are made with the simplicity and control of bilayer device fabrication. The significant improvement in photovoltaic performance of the reticulated heterojunction over the flat analog highlights the potential of these strategies to improve the efficiency of organic solar cells.