Department of Applied Physics, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.
ACS Nano. 2010 Mar 23;4(3):1385-92. doi: 10.1021/nn100039r.
Scanning tunneling microscopy and spectroscopy have been used to measure the local photovoltaic performance of prototypical polymer:fullerene (MDMO-PPV:PCBM) bulk heterojunction films with approximately 10 nm resolution. Fullerene-rich clusters are found to act as sinks, extracting electrons from a shell layer of a homogeneously mixed polymer:fullerene matrix, surrounding the fullerene cluster. The experimental results were quantitatively modeled with a drift-diffusion model that in first order accounts for the specific morphology. The same model has subsequently been used to calculate performance indicators of macroscopic solar cells as a function of film composition and characteristic size of the phase separation. As such, a first step has been set toward a quantitative correlation between nanoscopic and macroscopic device photovoltaic performance.
扫描隧道显微镜和光谱学已被用于以约 10nm 的分辨率测量原型聚合物：富勒烯（MDMO-PPV：PCBM）体异质结薄膜的局部光伏性能。富勒烯富集簇被发现作为汇，从富勒烯簇周围均匀混合的聚合物：富勒烯基质的壳层中提取电子。实验结果用漂移扩散模型进行了定量模拟，该模型在一阶中考虑了特定的形态。随后，相同的模型被用于计算宏观太阳能电池的性能指标，作为薄膜组成和相分离特征尺寸的函数。因此，在纳米级和宏观器件光伏性能之间建立定量相关性方面迈出了第一步。
