Despite the low production cost and good mechanical properties of the organic solar cells (OSC), their power conversion efficiency is low compared with other solar cells. Enhancing the solar efficiency of the OSC is one of the exciting goals of the materials science research. Semiconducting two-dimensional materials (S2DM) is characterized by their ultrathin structure and high optoelectrical efficacy. Combining the polymer used in the OSC with the S2DM in a hybrid structure makes it possible to enhance the cell efficiency through energy and/or electron transfer. Studying the organic solar materials-S2DM interface area using ultrahigh resolution optical and microscopic techniques makes it possible to optimize the assembly of such materials inside the cell to improve their efficiency. The energy transfer between the conjugated polymer thin film such as P3HT and S2DM as MoS2 were studied. The band gap of the MoS2 is lowered as a result of electron and/or energy injection from the P3HT. The high-resolution optical measurements conducted for the MoS2-P3HT showed a great dependence on the thickness of an inert polymer spacer separated them. The photoluminescence (PL) measurements accorded well with the optical measurements. However, a red-shift in the PL peak was observed in case of the MoS2-P3HT in absence of the polymer spacer. The amount of shift is decreased by increasing the thickness of the polymer spacer. The characteristic Raman bands of the MoS2 are shifted to a higher frequency as the thickness of the polymer spaces increased.

Investigating the energy transfer between organic and inorganic semiconductor two-dimensional material

2019 Spring National Meeting

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