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Organoboron Polymers for Photovoltaic Bulk Heterojunctions
Author(s) -
Cataldo Sebastiano,
Fabiano Simone,
Ferrante Francesco,
Previti Francesco,
Patanè Salvatore,
Pignataro Bruno
Publication year - 2010
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201000057
Subject(s) - photoelectric effect , heterojunction , materials science , photovoltaic system , polymer , optoelectronics , open circuit voltage , exciton , polymer solar cell , thin film , voltage , nanotechnology , solar cell , physics , composite material , electrical engineering , condensed matter physics , engineering , quantum mechanics
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.