Solution processable benzotriazole and fluorene containing copolymers for photovoltaic applications

KAYA E., APAYDIN D. H., Yildiz D. E., TOPPARE L., Cirpan A.

SOLAR ENERGY MATERIALS AND SOLAR CELLS, cilt.99, ss.321-326, 2012 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 99
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1016/j.solmat.2011.12.021
  • Dergi Adı: SOLAR ENERGY MATERIALS AND SOLAR CELLS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.321-326
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

2-Dodecyl benzotriazole and 9,9-dioctylfluorene containing alternating copolymers poly((9,9-dioctylfluorene)-2,7-diyl-(2-dodecyl-benzo[1,2,3]triazole)) (P1), poly((9,9-dioctylfluorene)-2,7-diyl-(4,7-bis(thien-2-yl) 2-dodecyl-benzo[1,2,3]triazole)) (P2), poly((9,9-dioctylfluorene)-2,7-diyl-(4,7-bis(3-hexylthien-5-yl) 2-dodecyl benzo[1,2,3]triazole)) (P3) were synthesized via a typical Suzuki coupling polymerization. UV-vis and electrochemical studies indicated that polymers have desirable HOMO-LUMO and band gap energy levels, enabling efficient electron transfer when blending them with fullerene derivatives. Photovoltaic properties of the copolymers mixed with [6,6] phenyl-C61-butyric acid methyl ester (PCBM), were investigated. P2 exhibited the best device performance with an open circuit voltage of 0.6 V. short circuit current of 3.4 mA/cm(2) and power conversion efficiency of 0.56% under Air mass 1.5 Global (AM 1.5G, 100 mW/cm(2)) illumination. Hole mobilities of the polymers were calculated using space charge limited current (SCLC) method and found to be in the order of 10(-5) for P1 and P2 and 10(-4) for P3. (C) 2012 Elsevier B.V. All rights reserved.