Correlation between structural and optical properties of composite polymer/fullerene films for organic solar cells
Correlation between structural and optical properties of composite polymer/fullerene films for organic solar cells
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DOI：
10.1002/adfm.200400521
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发表时间：
2005-07-01
影响因子：
19
通讯作者：
Brabec, CJ
中科院分区：
文献类型：
--
作者：
Erb, T;Zhokhavets, U;Brabec, CJ
我们研究了聚（3-己基噻吩-2，5-二基）/[6，6]-苯基C-61丁酸甲酯（P3 HT/PCBM）薄膜，它被广泛地用作塑料太阳能电池的活性层。通过掠入射X射线衍射（XRD）研究了它们的结构特性。确定了膜内结晶] P3 HT纳米畴的尺寸和取向。通过XRD在薄膜中未检测到PCBM微晶。退火后，P3 HT结晶度增加，导致在低光子能量区域的光吸收和光谱光电流的增加。因此，P3 HT/PCBM太阳能电池的效率显著提高。效率和P3 HT结晶度之间的直接关系被证明。
We investigate thin poly(3-hexylthiophene-2,5-diyl)/[6,6]-phenyI C-61 butyric acid methyl ester (P3HT/PCBM) films, which are widely used as active layers in plastic solar cells. Their structural properties are studied by grazing-incidence X-ray diffraction (XRD). The size and the orientation of crystalline]P3HT nanodomains within the films are determined. PCBM crystallites are not detected in thin films by XRD. Upon annealing, the P3HT crystallinity increases, leading to an increase in the optical absorption and spectral photocurrent in the low-photon-energy region. As a consequence, the efficiency of P3HT/PCBM solar cells is significantly increased. A direct relation between efficiency and P3HT crystallinity is demonstrated.