Photovoltaic performance of organic solar cells based on DH6T/PCBM thin film active layers

Oligothiophene Cruciform with a Germanium Spiro Center: A Promising Material for Organic Photovoltaics

“…Muhammad et al recently reported a power conversion efficiency of 0.01 % for a solution-processed sexithiophenebased solar cell. [8] Sakai et al obtained 2.38 % efficiency in a sexithiophene solar cell, but their device required fabrication by evaporation. [7] Hence our results show that the cruciform not only gives improved mobility but also improved performance of solution-processed solar cells.…”

“…Highly dispersive charge transport has already been observed in the case of 2 and septithiophene 4, [19] thus leading to a mobility value of 1.2 10 À6 cm 2 V À1 s À1 for 4 and 2.5 10 À6 cm 2 V À1 s À1 for 2. [8] Sakai et al obtained 2.38 % efficiency in a sexithiophene solar cell, but their device required fabrication by evaporation. [34] To demonstrate that the stacking structure is suitable for organic electronic devices, we made BHJ solar cells containing the Ge cruciform 6 as the donor and PC 71 BM as the acceptor.…”

“…Small molecules are more prone to self-assemble into ordered domains, thus yielding high charge-carrier mobility of the material and improved performance of OPV devices. [8] One method for improving OPV performance is to increase the dimensionality of the donor molecules through self-assembly to match it with the intrinsically three-dimensional (3D) character of intermolecular interactions in the fullerene acceptor phase. [5] One major advantage of small molecules over polymers is their superior levels of crystallinity, and there is great interest in new strategies for directed self-assembly.…”

“…For example, whilst it is possible to exceed 2 % efficiency in solar cells fabricated by the vacuum deposition of sexithiophene and C 70 , [7] a solution-processed cell with a blend of a,w-dihexylsexithiophene/PC 61 BM ( [6,6]phenyl C 61 -butyric acid methyl ester) has a PCE of only 0.01 %. [8] One method for improving OPV performance is to increase the dimensionality of the donor molecules through self-assembly to match it with the intrinsically three-dimensional (3D) character of intermolecular interactions in the fullerene acceptor phase. The increased dimensionality of star-shaped systems has been the subject of intense research in the last decade.…”

The Impact of Sunlight Intensity and Outdoor Temperature on the Performance of Inorganic Solar Panels

“…These evidences can be clearly proved from Figure 3 that the curve deviation shape along y-axis is more pronounced in comparison to that of the x-axis. The shape consistency of all the curves at various irradiation times defines the inherent property of bilayer solar cells, where a knee position on each curve is definitely presented [16]. This I-V curve behavior results in the production of a maximum power point (P max ), at which the external load is exactly matched with the internal resistance of the solar panel [17] .…”