http://www.cnr.it/ontology/cnr/individuo/prodotto/ID289203
Effect of the anchoring group in the performance of carbazole-phenothiazine dyads for dye-sensitized solar cells (Articolo in rivista)
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- Effect of the anchoring group in the performance of carbazole-phenothiazine dyads for dye-sensitized solar cells (Articolo in rivista) (literal)
- Anno
- 2015-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1016/j.dyepig.2014.09.032 (literal)
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- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Kankatala S.V. Gupta and Ji Zhang and Gabriele Marotta and Marri Anil Reddy and Surya Prakash Singh and Ashraful Islam and Liyuan Han and Filippo De Angelis and Malapaka Chandrasekharam and Mariachiara Pastore (literal)
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- http://www.sciencedirect.com/science/article/pii/S014372081400391X (literal)
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- Kankatala S.V. Gupta, Marri Anil Reddy, Surya Prakash Singh, Malapaka Chandrasekharam :Network of Institutes for Solar Energy (CSIR-NISE), Inorganic & Physical Chemistry Division, CSIR - Indian Institute of Chemical Technology, Uppal Road, Tarnaka, Hyderabad, 500607, India
Ji Zhang, Gabriele Marotta, Filippo De Angelis, Mariachiara Pastore: Computational Laboratory for Hybrid Organic Photovoltaics (CLHYO), Istituto CNR di Scienze e Tecnologie Molecolari, via Elce di Sotto 8, I-06123, Perugia, Italy
Ashraful Islam, Liyuan Han: Photovoltaic Materials Unit, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047, Japan
Ji Zhang: Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Chang Chun, 130024, Jilin, PR China (literal)
- Titolo
- Effect of the anchoring group in the performance of carbazole-phenothiazine dyads for dye-sensitized solar cells (literal)
- Abstract
- Abstract A combined experimental and theoretical study is carried out on two novel carbazole-phenothiazine dyadic dyes bearing the simple carboxylic acid and the more rarely investigated malonic acid as anchoring group. An improvement of the photovoltaic performances is observed when the malonic acid is employed in place of the carboxylic acid, even if the highest efficiencies for this family of organic dyes were recorded with the use of the cyanoacrylic and rhodanine-3-aceti acid as anchoring units. The low photocurrents measured in the case of the carboxylic anchoring are rationalized on the basis of the computational modelling of the isolated dye in solution as well as the investigation of the electronic structure of extended dye-sensitized TiO2 models. The theoretical calculations suggest that the low short current densities might arise from the unfavourable interplay of the dye's optical properties (blue shift of the absorption spectrum) and of the energy alignment between the dye's {LUMO} and the semiconductor conduction band edge, possibly causing an inefficient electron injection process. (literal)
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