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Recombination polymer heterojunctions

Additional semiconductor layers (charge-transport layers) may be included between the emissive layer and the electrode to facilitate transport of charges of one polarity, while impeding charges of the opposite polarity, thereby encouraging radiative recombination within the emissive layer, as shown in Fig. 11, for a polymer heterojunction device [30]. [Pg.422]

Blom PWM, Mihailetchi VD, Koster LJA, Markov DE (2007) Device physics of polymer fullerene bulk heterojunction solar cells. Adv Mater 19 1551 Onsager L (1938) Initial recombination of ions. Phys Rev 54 554... [Pg.209]

Pal SK, Kesti T, Maiti M, Zhang EL, Inganas O, Hellstrom S, Andersson MR, Oswald F, Langa F, Osterman T, Pascher T, Yartsev A, Sundstrom V (2010) Gemmate charge recombination in polymer/fullerene bulk heterojunction films and implications for solar cell function. J Am Chem Soc 132 12440... [Pg.209]

A. C. Morteani, P. K. H. Ho, R. H. Friend, and C. Silva. Electric field-induced transition from heterojunction to bulk charge recombination in bilayer polymer light-emitting diodes. Appl. Phys. Lett., 86 163501, 2005. [Pg.90]

Mozer, A.J., G. Dennler, N.S. Sariciftci, M. Westerling, A. Pivrikas, R. Osterbacka, and G. Juska. 2005. Time-dependent mobility and recombination of the photoinduced charge carriers in conjugated polymer/fullerene bulk heterojunction solar cells. Phys Rev B 72 035217. [Pg.1456]

Conventional organic bulk heterojunction solar cells do not have hole-blocking electron transport layers (HBETL) at the cathode/active layer interface. Metals with reasonably low-work function (e.g., calcium, aluminium, magnesium, or barium) are typically evaporated directly onto fullerene/polymer blend forming electronic contacts with both donor and acceptor materials under optimal conditions. This situation leads to significant recombination of positive and negative charge carriers at the active layer/cathode interface. [Pg.2121]

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