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Design and characterisation of bodipy sensitizers for dye-sensitized NiO solar cells.

Summers, Gareth H; Lefebvre, Jean-François; Black, Fiona A; Stephen Davies, E; Gibson, Elizabeth A; Pullerits, Tönu LU ; Wood, Christopher J and Zidek, Karel LU (2015) In Physical chemistry chemical physics : PCCP 18(2). p.1059-1070
Abstract
A series of photosensitizers for NiO-based dye-sensitized solar cells is presented. Three model compounds containing a triphenylamine donor appended to a boron dipyrromethene (bodipy) chromophore have been successfully prepared and characterised using emission spectroscopy, electrochemistry and spectroelectrochemistry, to ultimately direct the design of dyes with more complex structures. Carboxylic acid anchoring groups and thiophene spacers were appended to the model compounds to provide five dyes which were adsorbed onto NiO and integrated into dye-sensitized solar cells. Solar cells incorporating the simple dye were surprisingly promising relative to the more complex dye . Cell performances were improved with dyes which had increased... (More)
A series of photosensitizers for NiO-based dye-sensitized solar cells is presented. Three model compounds containing a triphenylamine donor appended to a boron dipyrromethene (bodipy) chromophore have been successfully prepared and characterised using emission spectroscopy, electrochemistry and spectroelectrochemistry, to ultimately direct the design of dyes with more complex structures. Carboxylic acid anchoring groups and thiophene spacers were appended to the model compounds to provide five dyes which were adsorbed onto NiO and integrated into dye-sensitized solar cells. Solar cells incorporating the simple dye were surprisingly promising relative to the more complex dye . Cell performances were improved with dyes which had increased electronic communication between the donor and acceptor, achieved by incorporating a less hindered bodipy moiety. Further increases in performances were obtained from dyes which contained a thiophene spacer. Thus, the best performance was obtained for which generated a very promising photocurrent density of 5.87 mA cm(-2) and an IPCE of 53%. Spectroelectrochemistry combined with time-resolved transient absorption spectroscopy were used to determine the identity and lifetime of excited state species. Short-lived (ps) transients were recorded for , and which are consistent with previous studies. Despite a longer lived (25 ns) charge-separated state for /NiO, there was no increase in the photocurrent generated by the corresponding solar cell. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical chemistry chemical physics : PCCP
volume
18
issue
2
pages
1059 - 1070
publisher
Royal Society of Chemistry
external identifiers
  • pmid:26660278
  • scopus:84952659313
  • wos:000369480600047
ISSN
1463-9084
DOI
10.1039/c5cp05177k
language
English
LU publication?
yes
id
97ab5cea-10b5-4f7d-9d4f-0a77593505e8 (old id 8505067)
date added to LUP
2016-01-08 10:49:25
date last changed
2017-10-29 04:06:25
@article{97ab5cea-10b5-4f7d-9d4f-0a77593505e8,
  abstract     = {A series of photosensitizers for NiO-based dye-sensitized solar cells is presented. Three model compounds containing a triphenylamine donor appended to a boron dipyrromethene (bodipy) chromophore have been successfully prepared and characterised using emission spectroscopy, electrochemistry and spectroelectrochemistry, to ultimately direct the design of dyes with more complex structures. Carboxylic acid anchoring groups and thiophene spacers were appended to the model compounds to provide five dyes which were adsorbed onto NiO and integrated into dye-sensitized solar cells. Solar cells incorporating the simple dye were surprisingly promising relative to the more complex dye . Cell performances were improved with dyes which had increased electronic communication between the donor and acceptor, achieved by incorporating a less hindered bodipy moiety. Further increases in performances were obtained from dyes which contained a thiophene spacer. Thus, the best performance was obtained for which generated a very promising photocurrent density of 5.87 mA cm(-2) and an IPCE of 53%. Spectroelectrochemistry combined with time-resolved transient absorption spectroscopy were used to determine the identity and lifetime of excited state species. Short-lived (ps) transients were recorded for , and which are consistent with previous studies. Despite a longer lived (25 ns) charge-separated state for /NiO, there was no increase in the photocurrent generated by the corresponding solar cell.},
  author       = {Summers, Gareth H and Lefebvre, Jean-François and Black, Fiona A and Stephen Davies, E and Gibson, Elizabeth A and Pullerits, Tönu and Wood, Christopher J and Zidek, Karel},
  issn         = {1463-9084},
  language     = {eng},
  number       = {2},
  pages        = {1059--1070},
  publisher    = {Royal Society of Chemistry},
  series       = {Physical chemistry chemical physics : PCCP},
  title        = {Design and characterisation of bodipy sensitizers for dye-sensitized NiO solar cells.},
  url          = {http://dx.doi.org/10.1039/c5cp05177k},
  volume       = {18},
  year         = {2015},
}