title: Upconversion in solar cells.
abstract: The possibility to tune chemical and physical properties in nanosized materials has a strong impact on a variety of technologies, including photovoltaics. One of the prominent research areas of nanomaterials for photovoltaics involves spectral conversion. Modification of the spectrum requires down- and/or upconversion or downshifting of the spectrum, meaning that the energy of photons is modified to either lower (down) or higher (up) energy. Nanostructures such as quantum dots, luminescent dye molecules, and lanthanide-doped glasses are capable of absorbing photons at a certain wavelength and emitting photons at a different (shorter or longer) wavelength. We will discuss upconversion by lanthanide compounds in various host materials and will further demonstrate upconversion to work for thin-film silicon solar cells.
authors: Copernicus Institute, Utrecht University, Budapestlaan 6, Utrecht 3584 CD, The Netherlands. w.g.j.h.m.vansark@uu.nl.
authors: Wilfried Gjhm
authors: WG
authors: van Sark
authors: Jessica
authors: J
authors: de Wild
authors: Jatin K
authors: JK
authors: Rath
authors: Andries
authors: A
authors: Meijerink
authors: Ruud Ei
authors: RE
authors: Schropp