Author/Authors :
M. Biancardo a، نويسنده , , *، نويسنده , , Ricky K. Taira، نويسنده , , *، نويسنده , , N. Kogo b، نويسنده , , 1، نويسنده , , H. KIKUCHI and K. HIBI، نويسنده , , 1، نويسنده , , N. Kumagai، نويسنده , , 1، نويسنده , ,
N. Kuratani b، نويسنده , , 1، نويسنده , , I. Inagawa b، نويسنده , , 1، نويسنده , , S. Imoto، نويسنده , , 1، نويسنده , , J. Nakata b، نويسنده , , 1، نويسنده ,
Abstract :
Microspherical solar cells and modules have been fabricated. The spherical nature of these semi-transparent devices allows the microspherical
cells to harvest both directly incident and diffuse components of sunlight thereby improving the solar energy conversion efficiency.
Indoor and outdoor characterizations of these three dimensional semi-transparent cells and modules are carried out using a Lambertian
reflector in order to assess the maximum efficiency of the devices. In the absence of the reflector the cell efficiency is 13.5% under standard
illumination (100 mW cm 2, A.M. 1.5, 25 C). However, this is significantly enhanced in the presence of the reflector. Microspherical modules
with the reflector are directly compared to similar semi-transparent modules comprised of traditional planar devices, in outdoor tests at
low light intensity (2.5–25 mW cm 2) to further demonstrate the benefits of the design particularly at low angle of incident radiation.
2006 Elsevier Ltd. All rights reserved.
