National Institute of Fundamental Studies, Hantana Road, Kandy 20000, Sri Lanka. Institute of Materials for Electronics and Magnetism (IMEM), Italian National Research Council (CNR), Parco Area delle Scienze 37/A, 43100 Parma, Italy.
Nanotechnology. 2017 Jan 20;28(3):035403. doi: 10.1088/1361-6528/28/3/035403. Epub 2016 Dec 14.
Hole collection and transport are crucial physical processes in bulk-heterojunction (BHJ) solar cells, which represent major bottlenecks due to their limitations in power conversion efficiency (PCE). Hence, a more efficient alternative is needed to accept and transport holes to the collection electrode in BHJ solar cells. Here, we bring both electron and hole collection centres close to the point of exciton generation by infiltrating P3HT poly(3-hexylthiophene):PCBM ([6,6]-phenyl-C61-butyric acid methyl ester) blend into a highly porous interconnected p-type NiO-nanoparticle (NiO-np) network, through solvent-assisted grafting. In this study, a hybrid polymer solar cell is demonstrated with a P3HT:PCBM:NiO-np triple-heterojunction active layer which showed greatly improved rectification behaviour, long electron lifetime and generated higher PCE of 4% under AM 1.5 solar illumination with a 75% increase in PCE with respect to the P3HT:PCBM device. The optimum NiO-np amount and active-layer thickness were found to be 2% and 250 nm, respectively.
空穴收集和传输是体异质结（BHJ）太阳能电池中的关键物理过程，由于其在功率转换效率（PCE）方面的限制，这些过程成为了主要的瓶颈。因此，BHJ 太阳能电池需要一种更有效的方法来接受和传输空穴到收集电极。在这里，我们通过溶剂辅助接枝的方法，将 P3HT 聚（3-己基噻吩）：PCBM（[6,6]-苯基-C61-丁酸甲酯）共混物渗透到高度多孔的互连 p 型 NiO 纳米颗粒（NiO-np）网络中，使电子和空穴收集中心更接近激子产生的位置。在这项研究中，展示了一种具有 P3HT:PCBM:NiO-np 三重异质结活性层的混合聚合物太阳能电池，该电池表现出了大大改善的整流行为、长电子寿命，并在 AM1.5 太阳光照下产生了 4%的更高 PCE，与 P3HT:PCBM 器件相比，PCE 提高了 75%。发现最佳的 NiO-np 量和活性层厚度分别为 2%和 250nm。
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