In the photoelectric conversion efficiency of solar Laptop batteries to now integrate crystalline silicon solar batteries “was approaching the theoretical limit (Sanyo Electric Research and Development Division Solar Energy Research Institute, Advanced Research Department Eiji Maruyama). Solar batteries are crystalline silicon on the theoretical conversion efficiency of 29%. His biggest factor is The Gap Band intrinsic crystalline silicon. Because the wavelength of light used to generate electricity is limited, then the efficiency will be reduced. To improve efficiency, we need to adopt a new alternative to crystalline silicon materials or quantum effects, such as the absorption of new technologies to extend the reach of a breakthrough “If theoretical limit. The goal is to exceed 40%. For the new objective, the development of solar batteries are about to enter a new era.
Around 2015, so the efficiency is 25 ~ 26%
Crystalline silicon solar Dell Inspiron 1420 battery efficiency of conversion to increase the limit of the largest, at around 2015. As solar battery silicon crystal to form the amorphous silicon layer table “HIT (Heterojunction with Intrinsic Thin layer) solar batteries,” The Exclusive manufacturer Sanyo Electric in May 2009 in the study achieved a unit of 23% conversion efficiency. The company said it was the practical size of 10cm square solar battery, a world record. According to general opinion, yield crystalline silicon solar battery conversion is about 29% of the theoretical and the maximum possible value of 25 ~ 26%, can be seen, with the largest value of the distance of only a small percentage of a few points.
Sanyo Electric Maruyama said: “The remaining increase of several percentage points of issues facing the conversion efficiency has made it clear, as the existing technology will be able to take time to develop regular achieve.” Series of specific improvements include: reducing the impact of the shadow of electrodes about 5% inhibition film and transparent VGP-BPS13/S conductive light absorption layer of amorphous silicon of about 5%, inhibit and amorphous silicon crystalline silicon default interface% recombination-induced carrier number. The maximum value of the utility of these methods can only be carried out. Before that, in order to improve the conversion efficiency was the use of these methods. If the current rate of increase, then the 2015 or so, laboratories, the conversion efficiency reaches 25 ~ 26%.
Development of a revolutionary solar battery
What is the ultimate solar batteries look like? In the NEDO “innovative research on solar energy technology and development” program, three research teams competing to come up with more than 40% conversion efficiency solar batteries form the research results (Figure 3). The three are hoping to attract the use of quantum effects, multi-junction technology and the condensing unit and use, the introduction of new materials and management technologies of light, so independent develop solar batteries with high efficiency. Whose common denominator is to fully utilize previously unavailable wavelength scale.