Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Hubei, PR China.
Phys Chem Chem Phys. 2012 Nov 7;14(41):14383-90. doi: 10.1039/c2cp43078a.
A new thiolate/disulfide mediator was designed and synthesized by employing DFT calculations as a guide. It possesses high transparency to visible light, a very attractive feature for bifacially active transparent DSCs that require a highly transparent counter electrode (CE). Compared to the reported and most promising thiolate/disulfide mediator T(-)/T(2), this new analogous mediator produced a major enhancement in open circuit potential (V(OC)) by about 40 mV and correspondingly a higher power conversion efficiency (η) for DSCs. Furthermore, a highly uniform and transparent (transmittance > 91%) poly(3,4-ethylenedioxythiophene) (PEDOT(BE)) CE was prepared and could efficiently catalyze the reduction of the disulfide. Based on the novel transparent redox couple and PEDOT(BE) CE, a new type of iodine-free and Pt-free transparent bifacial DSC was successfully fabricated. This new bifacial device could not only yield a promising front-illuminated η of 6.07%, but also produce an attractive η as high as 4.35% for rear-side irradiation, which exceeds the rear-illuminated η of 3.93% achieved for the same type of device, employing the dark-colored I(-)/I(3)(-) electrolyte.
一种新的硫醇/二硫化物介质被设计和合成，采用密度泛函理论（DFT）计算作为指导。它具有很高的可见光透明度，这是双面活性透明染料敏化太阳能电池（DSC）非常吸引人的特性，因为这种电池需要一个高度透明的对电极（CE）。与已报道的、最有前途的硫醇/二硫化物介质 T(-)/T(2)相比，这种新的类似介质在开路电压（V(OC)）方面提高了约 40mV，相应地提高了 DSCs 的功率转换效率（η）。此外，还制备了一种高度均匀和透明的（透光率>91%）聚 3,4-亚乙基二氧噻吩（PEDOT(BE)）CE，可有效地催化二硫化物的还原。基于新型透明氧化还原对和 PEDOT(BE) CE，成功制备了一种新型无碘和无 Pt 的透明双面 DSC。这种新的双面器件不仅在前照光下产生了有前途的 η 为 6.07%，而且在后照光下也产生了高达 4.35%的吸引力 η，超过了使用深色 I(-)/I(3)(-)电解质的同类型器件的后照光 η 为 3.93%。
