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High efficiency a‐Si//poly‐Si tandem solar cell
Author(s) -
Horiuchi Toshikazu,
Ma Wen,
Lim C. C.,
Yoshimi Masashi,
Hattori Kiminori,
Sada Chitose,
Okamoto Hiroaki,
Hamakawa Yoshihiro
Publication year - 1994
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.4391140509
Subject(s) - tandem , materials science , ohmic contact , energy conversion efficiency , optoelectronics , heterojunction , solar cell , layer (electronics) , nanotechnology , composite material
A series of experimental trials has been carried out to realize the high efficiency a‐Si//Poly‐Si tandem solar cell. Employing p ‐type μc‐SiC as a wide‐gap heterojunction window, a‐SiC as an interface buffer layer and n ‐type μc‐Si as a back ohmic contact layer, 17.2 percent conversion efficiency has been achieved with the structure of ITO/ p μc‐SiC/ n Poly‐Si/ n μc‐Si heterojunction. Utilizing an optically transparent a‐Si p‐i‐n cell as a top cell and inserting an optical coupler between the top and the Poly‐Si bottom cell, a high total efficiency of 21.0 percent has been obtained so far on the four‐terminal tandem cell. This conversion efficiency value represents a world record for a‐Si basis tandem solar cells.