Solar cell module using semiconductor nanocrystals

Abstract

Discussed is a solar cell module using semiconductor nanocrystals including a layer within which nanocrystals of a material having a down converting function of energy of incident light are dispersed. The solar cell module includes a plurality of solar cells including at least one photoelectric conversion layer, at least one transparent member provided on upper surfaces of the plurality of solar cells, and a filling layer to seal the plurality of solar cells, wherein at least one layer selected from the at least one transparent member and the filling layer contains the semiconductor nanocrystals.

1 . A solar cell module, comprising:
 a plurality of solar cells each including at least one photoelectric conversion layer;   at least one transparent member provided on upper surfaces of the plurality of solar cells; and   a filling layer to seal the plurality of solar cells,   wherein at least one layer selected from the at least one transparent member and the filling layer contains semiconductor nanocrystals.   
     
     
         2 . The solar cell module according to  claim 1 , further comprising a back sheet provided on lower surfaces of the plurality of solar cells. 
     
     
         3 . The solar cell module according to  claim 1 , wherein the at least one transparent member includes a transparent resin film. 
     
     
         4 . The solar cell module according to  claim 1 , wherein the at least one transparent member includes a rigid transparent substrate and a transparent resin film, and the transparent resin film contains the semiconductor nanocrystals. 
     
     
         5 . The solar cell module according to  claim 4 , wherein the rigid transparent substrate is a glass substrate. 
     
     
         6 . The solar cell module according to  claim 4 , wherein the transparent resin film is formed on at least one of a front surface and a rear surface of the rigid transparent substrate. 
     
     
         7 . The solar cell module according to  claim 3 , wherein the transparent resin film is an organic resin film or a fluoride resin film. 
     
     
         8 . The solar cell module according to  claim 1 , wherein the semiconductor nanocrystals convert incident light of a wavelength of about 300 nm to 500 nm into emitted light of a wavelength of about 600 nm to 1,100 nm. 
     
     
         9 . The solar cell module according to  claim 1 , wherein diameters of the semiconductor nanocrystals are in the range of about 1 nm to 100 nm. 
     
     
         10 . The solar cell module according to  claim 1 , wherein the number of photons of light emitted by the semiconductor nanocrystals is greater than the number of photons of light incident upon the semiconductor nanocrystals. 
     
     
         11 . The solar cell module according to  claim 1 , wherein the semiconductor nanocrystals have a core-shell structure, and materials of cores and shells of the semiconductor nanocrystals are the same or different. 
     
     
         12 . The solar cell module according to  claim 1 , wherein an amount of the semiconductor nanocrystals is about 1% to 10% by weight relative to a weight of the at least one layer within which the semiconductor nanocrystals are contained. 
     
     
         13 . The solar cell module according to  claim 1 , wherein the semiconductor nanocrystals are crystals of at least one kind selected from the group consisting of group IV elements, group IIA-VIB compounds, group IIIA-VB compounds, and group IIIB-VB compounds. 
     
     
         14 . The solar cell module according to  claim 1 , wherein the filling layer is made of Ethylene Vinyl Acetate copolymer (EVA). 
     
     
         15 . The solar cell module according to  claim 1 , wherein the plurality of solar cells is one selected from the group consisting of thin film silicon solar cells, crystalline silicon solar cells, compound solar cells, dye-sensitized solar cells, and organic solar cells. 
     
     
         16 . A solar cell, comprising:
 at least one photoelectric conversion layer; and   at least one layer provided on a surface of the photoelectric conversion layer upon which light is incident,   wherein the at least one layer contains semiconductor nanocrystals.   
     
     
         17 . The solar cell according to  claim 16 , wherein the at least one layer is at least one anti-reflection film that includes two or more layers, and an uppermost layer of the two or more layers contains the semiconductor nanocrystals. 
     
     
         18 . The solar cell according to  claim 16 , wherein the at least one photoelectric conversion layer includes a first conductivity-type semiconductor substrate and an emitter layer doped with a second conductivity-type impurity and provided on the first conductivity-type semiconductor substrate, and
 the solar cell further comprising:   first electrodes connected to the emitter layer; and   a second electrode connected to the first conductivity-type semiconductor substrate.   
     
     
         19 . The solar cell according to  claim 18 , wherein the at least one layer is at least one anti-reflection film, and the at least one anti-reflection film includes:
 a first anti-reflection film including at least one layer and formed on an upper surface of the emitter layer such that the first electrodes are connected to the emitter layer through the first anti-reflection film; and   a second anti-reflection film formed on a front surface of the first anti-reflection film, and containing the semiconductor nanocrystals.   
     
     
         20 . The solar cell according to  claim 16 , wherein the semiconductor nanocrystals are crystals of at least one kind selected from the group consisting of group IV elements, group IIA-VIB compounds, group IIIA-VB compounds, group IIIB-VB compounds, or a combination thereof.