Nanoparticle Agglomeration in Polymer-Based Solar Cells
Nanoparticle Agglomeration in Polymer-Based Solar Cells
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DOI：
10.1103/physrevlett.105.168701
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发表时间：
2010-10-12
影响因子：
8.6
通讯作者：
Mackay, Michael E.
中科院分区：
文献类型：
--
作者：
Kiel, Jonathon W.;Eberle, Aaron P. R.;Mackay, Michael E.
我们发现聚合物基太阳能电池在用小角中子散射进行退火热处理后，其表面形貌发生了很大的变化。初步处理(旋涂)后，苯基-C61-丁酸甲酯(PCBM)在聚(3-己基噻吩基)(P3HT)富相中得到了较好的分散。然而，PCBM结构在热处理后变得粗糙，这清楚地证明了在一个小波矢上散射强度的增加。纳米尺度上的形态变化与器件性能的改善和光致发光的同时、矛盾的增加有关。
We show that the morphology of polymer-based solar cells substantially changes after annealing using small angle neutron scattering. Phenyl-C61-butyric acid methyl ester (PCBM) is found reasonably well dispersed within the poly(3-hexylthiophene) (P3HT) rich phase after initial processing (spin coating). However, the PCBM structure coarsens after annealing, clearly evidenced by the increase in scattering intensity at a small wave vector. The change in morphology at the nanoscale is related to improved device performance and the simultaneous, contradictory, increase in photoluminescence.