Homogenous Voltage-Matched Strings Using Three-Terminal Tandem Solar Cells: Fundamentals and End Losses

被引：12

作者：

McMahon, William E. ^{[1
]}

Schulte-Huxel, Henning ^{[1
,2
]}

Buencuerpo, Jeronimo ^{[1
]}

Geisz, John F. ^{[1
]}

Young, Michelle S. ^{[1
]}

Klein, Talysa R. ^{[1
]}

Tamboli, Adele C. ^{[1
]}

Warren, Emily L. ^{[1
]}

机构：

[1] Natl Renewable Energy Lab, Golden, CO 80401 USA

[2] Inst Solar Energy Res Hamelin, D-31860 Emmerthal, Germany

来源：

IEEE JOURNAL OF PHOTOVOLTAICS | 2021年 / 11卷 / 04期

关键词：

Doping; Photovoltaic cells; Photovoltaic systems; Limiting; Wiring; Silicon; Renewable energy sources; Cell stringing; tandem cells; three-terminal; voltage-matched (VM);

D O I：

10.1109/JPHOTOV.2021.3068325

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Strings constructed from three-terminal tandem (3TT) solar cells offer the performance benefits of voltage-matching (which reduces sensitivity to spectral variation), but without the subcell voltage isolation required by four-terminal cells. However, the circuitry for a 3TT string can become complex, making circuit analysis more challenging. Here, we illustrate the essential features of "homogenous" voltage-matched (VM) 3TT strings, for which all 3TT cells in the string are nominally identical (with the same design/doping sequence, such that they can be fabricated on the same manufacturing line). Several representative VM string configurations are explicitly considered, and used to describe the general construction of string I(V) curves. End losses intrinsic to these strings are discussed in detail, along with mitigation strategies to minimize their impact. Our analysis agrees with experimental results for eight-cell strings constructed from GaInP/GaAs 3TT devices.

引用

页码：1078 / 1086

页数：9