NDLI: Reduced charge recombination by the formation of an interlayer using a novel dendron coadsorbent in solid-state dye-sensitized solar cells

Content Provider	Royal Society of Chemistry (RSC)
Author	Song, In Young Kwon, Young Soo Lim, Jongchul Jang, Hyun Myung Park, Taiho Park, Sung-Hae Park, Yoon-Cheol Siva, Ayyanar
Copyright Year	2012
Abstract	3,4,5-Tris(dodecyloxy)benzoic acid (DOBA) and the Z907 dye were coadsorbed to form a light-sensitizing monolayer in a solid-state dye-sensitized solar cell (sDSC). Coadsorption of DOBA which has three hydrocarbon chains permitted preparation of a denser monolayer of dyes and DOBA. This dense monolayer formed interlayer between TiO2 and Spiro-OMeTAD (hole conductor), effectively preventing charge recombination, while half of the photocurrent was dissipated via recombination reaction when Z907 solely anchored on the surface of TiO2. Moreover, the DOBA induced a lower population of density-of-state (DOS) in the surface of TiO2, shifting the position of the conduction band (CB) toward negative values. This resulted in higher open-circuit voltage (VOC) for the device made with Z907 and DOBA than that of the Z907-sensitized device. These surface properties were investigated using electrochemical impedance spectroscopy (EIS), intensity modulated photocurrent/photovoltage spectroscopy (IMPS and IMVS).
Starting Page	3467
Ending Page	3472
Page Count	6
File Format	HTM / HTML PDF
ISSN	20462069
Volume Number	2
Issue Number	8
Journal	RSC Advances
DOI	10.1039/c2ra01251k
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Dye-sensitized solar cell Spectroscopy Open-circuit voltage Hydrocarbon Carrier generation and recombination DOBA Dye Photocurrent Valence and conduction bands Electrochemistry Carabiner Doba language Electrical impedance
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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