基于共轭聚合物电解质的空穴传输层在聚合物太阳能电池中的应用。
Hole transport layer based on conjugated polyelectrolytes for polymer solar cells.
机构信息
Department of Chemistry, Research Institute for Natural Sciences, Hanyang University, Seoul 133-791, Republic of Korea.
Center for Polymers and Organic Solids, University of California Santa Barbara, Santa Barbara, CA 93106, USA.
出版信息
J Colloid Interface Sci. 2018 May 15;518:21-26. doi: 10.1016/j.jcis.2018.02.009. Epub 2018 Feb 7.
We demonstrate the conjugated polyelectrolytes (CPEs) as efficient hole transport layer (HTL) of polymer solar cells. Replacing poly(3,4-ethylenedioxy-thiophene):poly(styrenesulfonate) (PEDOT:PSS) with a CPEs with narrow bandgap results in both improvements in device efficiency and stability. In spite of their narrow bandgap, thin CPE films (thickness of ∼30 nm) enable sufficient light absorption within the active layer. Enhancement of device efficiency is attributed to low surface roughness, high transmittance in visible region, and reduced charge transfer resistance. Compared to the device with PEDOT:PSS, pH neutral nature of CPEs may enhance device stability under ambient condition.
我们展示了共轭高分子电解质（CPE）作为聚合物太阳能电池的高效空穴传输层（HTL）。用带隙较窄的 CPE 替代聚（3,4-乙撑二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT:PSS），可提高器件效率和稳定性。尽管 CPE 的带隙较窄，但厚度约为 30nm 的 CPE 薄膜可在活性层内实现足够的光吸收。器件效率的提高归因于低表面粗糙度、可见光区域的高光透过率和降低的电荷转移电阻。与具有 PEDOT:PSS 的器件相比，CPE 的 pH 值中性可能会增强器件在环境条件下的稳定性。
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