Resource efficient plasmon-based 2D-photovoltaics with reflective support

Resource efficient plasmon-based 2D-photovoltaics with reflective support.

For ultrathin (~10 nm) nanocomposite films of plasmonic materials and semiconductors, the absorptance of normal incident light is typically limited to about 50%. However, through addition of a non-absorbing spacer with a highly reflective backside to such films, close to 100% absorptance can be achieved at a targeted wavelength. Here, a simple analytic model useful in the long wavelength limit ...

Photovoltaics: A Tetraperylene Diimides Based 3D Nonfullerene Acceptor for Efficient Organic Photovoltaics (Adv. Sci. 4/2015)

Spiro-fluorene based 3D donor towards efficient organic photovoltaics.

A novel 3D donor material (SF8TBT) based on spiro-fluorene has been developed. Compared with the corresponding 1D linear molecule, the OPVs of this 3D donor exhibited power conversion efficiencies of 4.82%, much higher than that of 1D small molecules (1.69%).

Long-term efficient organic photovoltaics based on quaternary bulk heterojunctions

A major impediment to the commercialization of organic photovoltaics (OPVs) is attaining long-term morphological stability of the bulk heterojunction (BHJ) layer. To secure the stability while pursuing optimized performance, multi-component BHJ-based OPVs have been strategically explored. Here we demonstrate the use of quaternary BHJs (q-BHJs) composed of two conjugated polymer donors and two f...

Surface-Plasmon Enhanced Near-Bandgap Light Absorption in Silicon Photovoltaics

An extended Mie scattering theory is used in this paper to analyze the surface-plasmon enhanced light absorption in silicon for photovoltaic applications. The calculation results show that the optical absorption in silicon can be enhanced up to 50 times at resonance frequency by embedded spherical silver nanoparticles due to the local field enhancement by surface plasmons. The analysis reveals ...