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Oxygen‐Terminated Nanocrystalline Diamond Film as an Efficient Anode in Photovoltaics
Author(s) -
Lim Candy Haley Yi Xuan,
Zhong Yu Lin,
Janssens Stoffel,
Nesladek Milos,
Loh Kian Ping
Publication year - 2010
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.200902204
Subject(s) - materials science , photocurrent , diamond , indium tin oxide , pedot:pss , tin oxide , nanocrystalline material , anode , electrode , chemical vapor deposition , nanotechnology , optoelectronics , organic solar cell , sheet resistance , doping , chemical engineering , layer (electronics) , composite material , chemistry , engineering , polymer
The potential of using p‐doped nanocrystalline diamond as the anode for organic solar cells, because of its outstanding photostability and well‐matched energetics with organic dyes, is demonstrated. The interface dipole and open‐circuit potential can be tuned by varying the surface termination on diamond. Oxygenated nanocrystalline diamond (O‐NCD) exhibits the best photocurrent conversion among all the surface‐treated electrodes studied in this work because of its large open‐circuit potential. The good energy alignment of the valence band of O‐NCD with the HOMO of poly(3‐hexylthiophene), as well as its p‐doped characteristics, suggest that O‐NCD can replace the hole transport layer, such as PEDOT:PSS, needed for efficient performance on indium tin oxide (ITO) electrodes. If the sheet resistance and optical transparency on NCD can be further optimized, chemical‐vapor‐deposited diamond electrodes may offer a viable alternative to ITO and fluorinated tin oxide (FTO).