화학공학소재연구정보센터
Solar Energy Materials and Solar Cells, Vol.126, 163-169, 2014
Near-infrared-sensitive bulk heterojunction solar cells using nanostructured hybrid composites of HgTe quantum dots and a low-bandgap polymer
Near-infrared (NIR)-sensitive hybrid bulk heterojunction solar cells were developed using NIR-absorbing HgTe quantum dots (QDs) and a low-bandgap polymer, poly[2,6-(4,4'-bis-(2-ethylhexyl)dithieno[3,2-b:2',3'-d]silole)-alt-4,7(2,1,3-benzothiadiazole)] (PSBTBT). Hybrid composites of HgTe QDs and PSBTBT facilitate broad-range exploitation of the solar spectrum and efficient carrier dissociation prior to recombination. Nanostructures were formed on the surface of the hybrid composite via a nanoimprinting process using an anodic aluminum oxide (AAO) mold. This contributes to optical light scattering for efficient utilization of light up to the NIR region and enlarged photoactive layer-electrode interfacial areas for improving charge extraction, increasing the overall efficiency from 1.09 to 1.41%. (C) 2014 Elsevier B.V. All rights reserved.