Impact of additive residue on the photodegradation of high performance polymer solar cells
Impact of additive residue on the photodegradation of high performance polymer solar cells
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DOI：
10.1016/j.orgel.2017.05.021
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发表时间：
2017-10
影响因子：
3.2
通讯作者：
Xusheng Zhao;Jing Zhao;R. Wu;Debei Liu;G. Wang;Ping Li;Li-jia Chen;Linna Zhu;B. Ding;
中科院分区：
文献类型：
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作者：
Xusheng Zhao;Jing Zhao;R. Wu;Debei Liu;G. Wang;Ping Li;Li-jia Chen;Linna Zhu;B. Ding;
溶剂添加剂是实现高效有机太阳能电池不可或缺的。添加剂残留物是不可避免的，特别是当器件在室温和大气压下制备时。本文以高沸点的1，10-二碘十二烷（DID）为添加剂，研究了添加剂残留物对有机材料光降解和光照后太阳能电池光电性能的影响。通过X射线光电子能谱（XPS）测量，可以确认活性层中DID残留物中的碘。使用傅里叶变换红外光谱仪（FTIR）探测薄膜在光照下的结构变化。发现与没有添加剂残留物的那些相比，残留的DID显著降低了活性层的光稳定性和光照射下的器件性能，这在电流密度-电压（J-V）和电化学阻抗测量中被举例说明。此外，具有添加剂残基的膜的吸收在光照射后不变，表明聚合物的共轭不受残基的影响。
Solvent additives are indispensable to achieve highly efficient organic solar cells. The additive residue is unavoidable especially when the devices are prepared at room temperature and atmospheric pressure. In this paper, we introduce 1,10-diiododecane (DID) as the additive, which has high boiling point, and investigate the effects of additive residue on the photodegradation of organic materials and photoelectric properties of solar cells after light illumination. The iodine from the residue of DID in the active layer could be confirmed by X-ray photoelectron spectroscope (XPS) measurements. Structural changes in the films upon illumination are probed using Fourier Transform Infrared Spectrometer (FTIR). The residual DID is found to dramatically decrease the photostability of the active layer and device performance under light illumination compared with those without additive residue, which are exemplified in current density–voltage (J-V)and electrochemical impedance measurements. Furthermore, the absorption of the film with additive residue is unchanged after light illumination, indicating that the conjugation of the polymer is not affected by the residue.