Fabrication and Characterization of Fullerene-Based Bulk Heterojunction Solar Cells with Porphyrin, CuInS2, Diamond and Exciton-Diffusion Blocking Layer

Abstract

Abstract:Fullerene-based bulk heterojunction solar cells were fabricated, and the electronic and optical properties were investigated. C 60 were used as n-type semiconductors, and porphyrin, CuInS 2 and diamond were used as p-type semiconductors. An effect of exciton-diffusion blocking layer of perylene derivative on the solar cells between active layer and metal layer was also investigated. Optimized structures with the exciton-diffusion blocking layer improved conversion efficiencies. Electronic structures of the molecules were investigated by molecular orbital calculation, and energy levels of the solar cells were discussed. Nanostructures of the solar cells were investigated by transmission electron microscopy, electron diffraction and X-ray diffraction, which indicated formation of mixed nanocrystals.

Fabrication and Characterization of PCBM:P3HT Bulk Heterojunction Solar Cells Doped with Germanium Phthalocyanine or Germanium Naphthalocyanine

“…High IQEs are observed for the GePc and GeNc, which would be effective for photovoltaic properties. figures by adjusting to the present work [16][17][18][19][20]. In the cell with the inverted structure, electrons are transported to an ITO substrate, and holes are transported to an Au electrode.…”

Fabrication and Characterization of Phthalocyanine/C<sub>60</sub> Solar Cells with Inverted Structure

“…An energy level diagram of the heterojunction solar cells with normal and inverted structures were summarized as shown in Figure 4. Previously reported values were used for the energy levels of the figures by adjusting to the present work [15][16][17]. Energy barrier would exist near the semiconductor/metal interface.…”

“…To reduce the energy barrier, PCBM with higher LUMO levels is suitable. Voc of organic solar cells is related with energy gap between HOMO of MPc and LUMO of C 60 or PCBM, and control of the energy levels is important to improve the photovoltaic performance [15]. …”

Role of non‐specific DNA in reducing coding DNA requirement for transient gene expression with CHO and HEK‐293E cells

“…It is well known that porphyrins are highly conjugated organic molecules, and their properties1 are used for some functional devices, for example, photodiodes,2 catalysts,3 artificial solar energy conversion systems,4 and particularly for sensor devices 5…”