Polymer aggregation correlated transition from Schottky-junction to bulk heterojunction organic solar cells" (2014).

We succeeded to fabricate p-n heterojunction and bulkheterojunction small-molecular-weight organic thin-film solar cells by combination of dry (p-type = zinc phthalocyanine, n-type = fullerene) and wet (p-type = tetra-tert-butyl zinc phthalocyanine, n-type = [6,6]-phenylC61-buteric acid methyl ester) processes. Relationship between morphologies of semiconducting layers and photovoltaic properti...

Nanostructured phase-separated blends, or bulk heterojunctions, of conjugated polymers and fullerene derivatives form a very attractive approach to large-area, solid-state organic solar cells.The key feature of these cells is that they combine easy processing from solution on a variety of substrates with good performance. Efficiencies of up to 5% in solar light have been achieved, and lifetimes...

Crystalline silicon solar cells are a proven renewable energy technology, but they have yet to reach low costs commensurate with subsidy-free, grid-scale adoption. To achieve the widespread adoption of photovoltaics, the cost per unit of electricity must be reduced by increasing solar cell efficiency. Parts per trillion concentrations of iron impurities in the silicon material can severely limi...

Institute for Optical Materials and Technologies “Acad. J. Malinowski”, Bulgarian Academy of Sciences, “Acad. G. Bonchev” str. Bl. 109, 1113 Sofia, Bulgaria Sofia University.”St. Kliment Ohridski, Faculty of Chemistry and Farmacy, 1 James Bourchier Blvd., 1164 Sofia, Bulgaria Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, “Acad. G. Bonchev” str. Bl....

In this work, the operation mechanism of hybrid solar cells is studied explicitly. The excitation, diffusion and dissociation of singlet and triplet excitons and charge transport of free charge carriers are studied and their corresponding rates are calculated for a flexible P3HT:SiNW hybrid solar cell. The rates are found to be faster for singlet than triplet excitons. Possible loss mechanisms ...

Modeling of solar cell is a very difficult task. This is because of the non linear behavior of the cell. Different types of modeling for solar cells are available in the literature. The theme of the modeling is based on the solar radiation and temperature of the system and environment. Determination of cell parameters like Iph, Is, Rs ,Rsh and ideality factor generally affects the performance o...

background: astronauts will be exposed to both chronic space radiation and acute high doses of energetic radiation of solar particle events in long-term deep space missions. the application of radioprotectors in space missions has basic limitations such as their very short time window as well as their acute toxicity and considerable side effects. the aim of the present study was to investigate ...

We present an all-oxide solar cell fabricated from vertically oriented zinc oxide nanowires and cuprous oxide nanoparticles. Our solar cell consists of vertically oriented n-type zinc oxide nanowires, surrounded by a film constructed from p-type cuprous oxide nanoparticles. Our solution-based synthesis of inexpensive and environmentally benign oxide materials in a solar cell would allow for the...