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Light absorption and photoluminescence quenching properties of bulk heterojunction materials based on the blend of poly(n-vinylcarbazole) poly(n-hexylthiophene)

The optimized material showed a broad absorption in the region from ultra violet to near infra-red and the photoluminescence quenching higher than 90%. The obtained results provide further insight into photophysics of the heterojunction system and device performance improvement by using this system as an active layer. | Communications in Physics, Vol. 29, No. 1 (2019), pp. 55-61 DOI:10.15625/0868-3166/29/1/13228 LIGHT ABSORPTION AND PHOTOLUMINESCENCE QUENCHING PROPERTIES OF BULK HETEROJUNCTION MATERIALS BASED ON THE BLEND OF POLY(N-VINYLCARBAZOLE)/POLY(N-HEXYLTHIOPHENE) PHAN DINH LONG1 , NGUYEN NANG DINH2 AND NGUYEN PHUONG HOAI NAM2,† 1 Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam 2 Faculty of Engineering Physics and Nano-Technology, University of Engineering and Technology, Vietnam National University, Hanoi, 144 Xuan Thuy, Cau Giay, Hanoi, Vietnam † E-mail: namnph@vnu.edu.vn Received 26 October 2018 Accepted for publication 01 December 2018 Published 15 February 2019 Abstract. The enhancement of light absorption and photoluminescence quenching properties of the bulk heterojunction systems which were fabricated using poly(N-vinylcarbazole) (PVK); poly(N-hexylthiophene) (P3HT) and fullerene derivative 1-(3-methoxycarbonyl) propyl-1-phenyl[6,6] C61 (PCBM) were investigated. The optimized material showed a broad absorption in the region from ultra violet to near infra-red and the photoluminescence quenching higher than 90%. The obtained results provide further insight into photophysics of the heterojunction system and device performance improvement by using this system as an active layer. Keywords: PVK, P3HT, OSC, light absorption, heterojunction, blend polymer. Classification numbers: 42.25.Bs; 36.20.Fz. c 2019 Vietnam Academy of Science and Technology 56 LIGHT ABSORPTION AND PHOTOLUMINESCENCE QUENCHING PROPERTIES . I. INTRODUCTION Application of conducting polymers to optoelectronic devices, such as light emitting diodes, and solar cells are of practical significance, because the polymer mixture can be easily prepared and modified by rich chemical procedures to meet optical and electronic requirements. Similar to inorganic solar cells, charge carriers in organic photovoltaic are