2/25/2011
Bulk-Heterojunction Solar Cells with Benzotriazole-Based Copolymers as Electron Donors: Largely Improved Photovoltaic Parameters by Using PFN/Al Bilayer Cathode
(9771–9778) Macromolecules 43 #23 (2010)
Zhang et al of South China University of Technology, China  synthesized three benzotriazole (BTA)-based conjugated polymers PF-DTBTA, PCz-DTBTA, and PPh-DTBTA, with electron-donating segments of fluorene, carbazole, and dialkoxybenzene, respectively, as new polymeric donors in bulk-heterojunction (BHJ) photovoltaic cells (PVCs).  The N−N interactions between the BTA-based polymers and the PFN may modify interfacial contact, resulting in enhancement of the electron extraction from the acceptor phase to the cathode and decreasing hole−electron recombination in the active layer. Consequently, PFN/Al bilayer cathode elevated PCE values to 1.3%, 2.75%, and 1.39% for PF-DTBTA, PCz-DTBTA, and PPh-DTBTA, respectively. The most significant increasing of PCE with a calculated value of 80% was found for PCz-DTBTA as the donor, and this might be related to the additional N−N interactions between the carbazole segments and the PFN. (RDC 2/26/2011)

1/21/2011
Bulk-Heterojunction Solar Cells with Benzotriazole-Based Copolymers as Electron Donors: Largely Improved Photovoltaic Parameters by Using PFN/Al Bilayer Cathode
(9771–9778) Macromolecules 43 #23 (2010)
Zhang  et al of South China University of Technology, China synthesized three benzotriazole (BTA)-based conjugated polymers PF-DTBTA, PCz-DTBTA, and PPh-DTBTA, with electron-donating segments of fluorene, carbazole, and dialkoxybenzene, respectively, as new polymeric donors in bulk-heterojunction (BHJ) photovoltaic cells (PVCs).  (RDC 1/18/2011)