Organoboron Polymers for Photovoltaic Bulk Heterojunctions

✍ Scribed by Sebastiano Cataldo; Simone Fabiano; Francesco Ferrante; Francesco Previti; Salvatore Patanè; Bruno Pignataro

• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 375 KB
• Volume: 31
• Category: Article
• ISSN: 1022-1336
• DOI: 10.1002/marc.201000057

✦ Synopsis

Abstract

We report on the application of three‐coordinate organoboron polymers, inherently strong electron acceptors, in flexible photovoltaic (PV) cells. Poly[(1,4‐divinylenephenylene)(2,4,6‐triisopropylphenylborane)] (PDB) has been blended with poly(3‐hexylthiophene‐2,5‐diyl) (P3HT) to form a thin film bulk heterojunction (BHJ) on PET/ITO substrates. Morphology may be modulated to give a high percentage of domains (10–20 nm in size) allowing exciton separation. The photoelectric properties of the BHJs in devices with aluminium back electrodes were imaged by light beam induced current (LBIC) and light beam induced voltage (LBIV) techniques. Open circuit voltages, short circuit currents and overall external quantum efficiencies obtained are among the highest reported for all‐polymer PV cells.

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