In this work, we have studied the photoluminescence (PL) quenching of two polymeric composites, poly[2- methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) and poly(3-hexylthiophene) (P3HT) in presence of nc-TiO2 particles by PL- spectroscopy. PL quenching values are and , for MEH-PPV+nc-TiO2 and P3HT+nc-TiO2, respectively. The obtained results on the relationship of PL quenching and photoelectrical efficiency (PCE) of an OSC showed that the quenching coefficient of a semiconducting polymer can be considered as apreliminary criterion for choosing an appropriate polymeric composite being used for OSC preparation. | Communications in Physics, Vol. 24, No. 3S1 (2014), pp. 22-28 DOI: PHOTOLUMINESCENCE QUENCHING OF NANOCOMPOSITE MATERIALS USED FOR ORGANIC SOLAR CELLS TRAN THI THAO, DO NGOC CHUNG, NGUYEN NANG DINH University of Engineering and Technology, Vietnam National University, Hanoi VO-VAN TRUONG Department of Physics, Concordia University, 1455 de Maisonneuve Blvd W., Montreal Quebec, Canada H3G 1M8 E-mail: dinhnn@ Received 04 June 2014 Accepted for publication 24 August 2014 Abstract. In this work, we have studied the photoluminescence (PL) quenching of two polymeric composites, poly[2methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) and poly(3-hexylthiophene) (P3HT) in presence of nc-TiO2 particles by PL- spectroscopy. PL quenching values are and , for MEH-PPV+nc-TiO2 and P3HT+nc-TiO2 , respectively. The obtained results on the relationship of PL quenching and photoelectrical efficiency (PCE) of an OSC showed that the quenching coefficient of a semiconducting polymer can be considered as apreliminary criterion for choosing an appropriate polymeric composite being used for OSC preparation. Under illumination of solar energyof 56 mW/cm2 , P3HT+TiO2 based OSC possess FF, VOC , JSC and PCE of , V, mA/cm2 and , respectively. Keywords: photoluminescence (PL) quenching, nc-TiO2 , MEH-PPV+nc-TiO2 , P3HT+nc-TiO2 , heterojunctions, organic solar cell (OSC). I. INTRODUCTION Recently, solar cells based on organic materials are increasingly interesting because of their possibility to reduce the fabrication cost [1-3]. Organic solar cells (OSCs) should have the following features: a strong light absorption over the whole solar spectrum; an appropriate energetic distance between the highest occupied molecular orbital (HOMO) and the lowest occupied molecular orbital (LUMO) of polymer to form a high open circuit voltage; a high and balanced electron and hole mobility in the polymer layer [4, 5]. When .
