ACS Appl Mater Interfaces. 2010 May;2(5):1281-5. doi: 10.1021/am100076a.
We have developed polymer solar cells featuring a buffer layer of polythiophene (PT) sandwiched between the active layer and the poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) layer. We attribute the improvement in power conversion efficiency of these polymer solar cells, relative to that of those based on poly(3-hexylthiophene):[6,6]-phenyl-C(61)-butyric acid methyl ester (P3HT:PCBM), to a reduction in the degree of carrier recombination at the junction interface. Because the conductivity and the energy level of PT can be tuned simply by applying a bias to it in an electrolytic solution, we also investigated the effect of the energy level on the devices' performances. The power conversion efficiency of a solar cell containing a PT buffer layer reached 4.18% under AM 1.5 G irradiation (100 mW/cm(2)).
我们已经开发出一种聚合物太阳能电池，其特点是在活性层和聚（3,4-乙撑二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT：PSS）层之间夹有聚噻吩（PT）缓冲层。我们将这些聚合物太阳能电池的功率转换效率的提高归因于在结界面处减少了载流子复合的程度。由于通过在电解质溶液中施加偏压可以简单地调整 PT 的电导率和能级，我们还研究了能级对器件性能的影响。在 AM 1.5 G 辐照（100 mW/cm(2)）下，含有 PT 缓冲层的太阳能电池的功率转换效率达到 4.18%。
