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Titolo:
Photocurrent enhancement of hemicyanine dyes containing RSO3- group through treating TiO2 films with hydrochloric acid
Autore:
Wang, ZS; Li, FY; Huang, CH;
Indirizzi:
Peking Univ Univ Hong Kong, State Key Lab Rare Earth Mat Chem & Applicat, Joint Lab Rare Earth Mat & Bioinorgan Chem, Beijing 100871, Peoples R ChinaPeking Univ Univ Hong Kong Beijing Peoples R China 100871 eoples R China
Titolo Testata:
JOURNAL OF PHYSICAL CHEMISTRY B
fascicolo: 38, volume: 105, anno: 2001,
pagine: 9210 - 9217
SICI:
1520-6106(20010927)105:38<9210:PEOHDC>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
LANGMUIR-BLODGETT MONOLAYERS; 2ND-ORDER OPTICAL NONLINEARITIES; IMPROVED 2ND-HARMONIC GENERATION; NANOCRYSTALLINE TIO2; PHOTOELECTRIC CONVERSION; SOLAR-CELLS; SEMICONDUCTOR-FILMS; ELECTRON-TRANSFER; CHARGE-TRANSFER; ZINC COMPLEX;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
40
Recensione:
Indirizzi per estratti:
Indirizzo: Huang, CH Peking Univ Univ Hong Kong, State Key Lab Rare Earth Mat Chem & Applicat, Joint Lab Rare Earth Mat & Bioinorgan Chem, Beijing 100871, Peoples R China Peking Univ Univ Hong Kong Beijing Peoples R China 100871 hina
Citazione:
Z.S. Wang et al., "Photocurrent enhancement of hemicyanine dyes containing RSO3- group through treating TiO2 films with hydrochloric acid", J PHYS CH B, 105(38), 2001, pp. 9210-9217

Abstract

Two kinds of hemicyanine dyes, 2-[4-(dimethylamino)styryl]benzothiazolium propylsulfonate (BTS) and 2-[4(dimethylamino)styryl]-3.3-dimethylindolium propylsulfonate (IDS), were synthesized and characterized with respect to their UV-vis, fluorescence, and redox properties. Both dyes show outstanding properties for charge transfer on HCl-treated nanocrystalline TiO2 films with near 100% incident monochromatic photon-to-electron conversion efficiency (IPCE) at the maximum absorption wavelength. This treatment was found to improve short-circuit photocurrent significantly. with increases by 99% and329% for BTS and IDS, respectively. Overall yields were hence improved remarkably as a result of photocurrent enhancement: BTS increased by 66% from 3.1% to 5.1% and IDS increased by 260% from 1.3% to 4.8%. This phenomenon can be explained by the positive shift of flat band potential for TiO2 and the increased amount of adsorbed dye molecules upon HCl treatment. The values for IPCE. short-circuit photocurrent, and overall solar energy to electricity conversion efficiency are all among the highest values respectively inthe pure organic sensitizers reported so far.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 31/03/20 alle ore 22:39:19