Near-infrared-sensitive bulk heterojunction solar cells using nanostructured hybrid composites of HgTe quantum dots and a low-bandgap polymer

作者：Nam Minwoo; Kim Sungwoo; Kim Sejin; Jeong Sohee; Kim Sang Wook; Lee Keekeun^*

来源：Solar Energy Materials and Solar Cells, 2014, 126: 163-169.

DOI：10.1016/j.solmat.2014.03.027

• Hybrid solar cell
• HgTe quantum dot
• Low-bandgap polymer
• Nanoimprinting
• Anodic aluminum oxide

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%26apos;-bis-(2-ethylhexyl)dithieno[3,2-b:2%26apos;,3%26apos;-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%.

• 出版日期2014-7