Dalian compound was first proposed by 'quantum cutting solar panels' concept

A few days ago, the Chinese Academy of Sciences dalian compound by photoelectric material dynamics, dc team Wu Kaifeng researcher team for the first time put forward & other; Quantum cutting solar panels & throughout; Concept, and based on the concept of quantum cutting is applied to fluorescent type solar panels, preparation of new type of solar panels prototype device efficiency than conventional devices. Relevant results published in the 'nano letters' ( 纳米快报) On.

type fluorescent solar panels is a kind of large area of solar energy capture device structure is relatively simple, it is composed of the chromophore by coating or embedded in transparent substrate ( Such as glass, etc. ) Composition. The chromophore on the absorption of the incident to the board of the photon after emit photons, due to the difference of basement and air refractive index, about 75% of the photons into total reflection mode, in turn, be on the edge of plate waveguide, is used to stimulate on the edge of the solar cell. If the collector efficiency is high enough, a fluorescent type solar panels and edge of a small amount of solar cells on the function is equivalent to a block of large area of solar cells, and this will greatly reduce the cost of pv capacity. In addition, translucent type fluorescent solar panels can be directly integrated into might become solar window glass window, which will now consume type buildings into self-sufficient in energy production unit. However, the traditional fluorescent type solar panels is limited by low efficiency of the chromophore fluorescence, and the absorption loss, cause device internal optical efficiency is generally less than 60%.

quantum cutting is a kind of novel optical phenomenon, based on the effect of the material can absorb a high-energy photons, released two low-energy photons at the same time, meet the basic physical laws of conservation of energy. The research team based on quantum cutting effect of creative type fluorescent solar panels, which can realize the multiplication of fluorescence quantum efficiency in theory, at the same time fully inhibit the absorption loss, therefore, the internal optical efficiency of solar panels can redefine a new theoretical limit of 150%.

based on this concept, the team created a show typical quantum cutting characteristics of rare earth metal ytterbium doped nanocrystalline materials, and using this kind of preparation of quantum cutting of the original fluorescence nanocrystals type solar panels, realized the internal optical efficiency about 120% of the device. The research is put forward for the first time & other; Quantum cutting solar panels & throughout; Concept, in the field of lowering the cost of photovoltaic (pv), intelligent buildings, has broad application prospects.