CONTROLLING THE 3D NANOSCALE ORGANIZATION OF BULK HETEROJUNCTION POLYMER SOLAR CELLS
The performance of polymer solar cells (PSC) critically depends on the three-dimensional nanoscale morphology of electron donor and electron acceptor components in the photoactive layer. Controlled annealing treatment, either at elevated temperature or during slow solvent evaporation (so-called solvent-assisted annealing), is the crucial step to tune the morphology of the photoactive layer made of poly(3-hexylthiophene) (P3HT) and a methanofullerene derivative (PCBM) towards the design of highperformance polymer solar cells. In this study, we demonstrate, by applying conventional 2D transmission electron microscopy (TEM) in combination with electron diffraction and 3D TEM tomography techniques, that controlled aggregation of P3HT already in solution, optimized spin coating conditions and subsequent tuned annealing treatments result in the formation of nanoscale interpenetrating networks with high crystalline order and favorable concentration gradients of both components through the thickness of the photoactive layer.
Svetlana van Bavel Erwan Sourty Gijsbertus de With Joachim Loos
Laboratory of Materials and Interface Chemistry and Soft Matter Cryo-TEM Research Unit,Eindhoven Uni Laboratory of Materials and Interface Chemistry and Soft Matter Cryo-TEM Research Unit,Eindhoven Uni Laboratory of Materials and Interface Chemistry and Soft Matter Cryo-TEM Research Unit,Eindhoven Uni Laboratory of Materials and Interface Chemistry and Soft Matter Cryo-TEM Research Unit,Eindhoven Uni
国际会议
International Symposium on Polymer Physics(2008年国际高分子物理学术会议PP2008)
厦门
英文
302-303
2008-06-08（万方平台首次上网日期，不代表论文的发表时间）