Abstract

Three new metal-free organic dyes with the [1]benzothieno[3,2-b]benzothiophene (BTBT) ?-bridge, having thestructure donor-?-acceptor (D-?-A) and labeled as 19, 20 and 21, have been designed and synthesized for application in dyesensitizedsolar cells (DSSC). Once the design of the ?-acceptor block was fixed, containing the BTBT as the ?-bridge and thecyanoacrylic group as the electron acceptor and anchoring unit, we selected three donor units with different electron-donorcapacity, in order to assemble new chromophores with high molar extinction coefficients (?), whose absorption features wellreflect the good performance of the final DSSC devices. Starting with the 19 dye, which shows a molar extinction coefficient ? ofover 14,000 M-1 cm-1 and takes into account the absorption maximun at the longer wavelength, the substitution of the BFTdonor unit with the BFA yields a great enhancement of absorptivity (molar extinction coefficient ? > 42,000 M-1 cm-1), untilreaching the higher value (? > 69,000 M-1 cm-1) with the BFPhz donor unit. The good general photovoltaic performancesobtained with the three dyes highlight the suitable properties of electron-transport of the BTBT as the ?-bridge in organicchromophore for DSSC, making this very cheap and easy to synthesize molecule particularly attractive for efficient and low-costphotovoltaic devices

Autore Pugliese

• Cardone Antonio , Capodilupo Agostina Lina

Tutti gli autori

• A.L. Capodilupo; E. Fabiano; L. De Marco; G. Ciccarella; G. Gigli; C. Martinelli; A. Cardone

Titolo volume/Rivista

Journal of organic chemistry

Anno di pubblicazione

2016

ISSN

1520-6904

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

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Numero di citazioni Scopus

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Ultimo Aggiornamento Citazioni

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Settori ERC

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Codici ASJC

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