>21% Efficient Silicon Heterojunction Solar Cells on n- and p-Type Wafers Compared

被引：189

作者：

Descoeudres, Antoine ^{[1
]}

Holman, Zachary C. ^{[1
]}

Barraud, Loris ^{[1
]}

Morel, Sophie ^{[1
]}

De Wolf, Stefaan ^{[1
]}

Ballif, Christophe ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Inst Microengn IMT, Photovolta & Thin Film Elect Lab, CH-2000 Neuchatel, Switzerland

来源：

IEEE JOURNAL OF PHOTOVOLTAICS | 2013年 / 3卷 / 01期

关键词：

Amorphous silicon; crystalline silicon; heterojunctions; photovoltaic cells; TEMPERATURE-DEPENDENCE; RECOMBINATION; LEVEL;

D O I：

10.1109/JPHOTOV.2012.2209407

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：

The properties and high-efficiency potential of front- and rear-emitter silicon heterojunction solar cells on n- and p-type wafers were experimentally investigated. In the low-carrier-injection range, cells on p-type wafers suffer from reduced minority carrier lifetime, mainly due to the asymmetry in interface defect capture cross sections. This leads to slightly lower fill factors than for n-type cells. By using high-quality passivation layers, however, these losses can be minimized. High open-circuit voltages (V(OC)s) were obtained on both types of float zone (FZ) wafers: up to 735 mV on n-type and 726 mV on p-type. The best V-OC measured on Czochralski (CZ) p-type wafers was only 692 mV, whereas it reached 732 mV on CZ n-type. The highest aperture-area certified efficiencies obtained on 4 cm(2) cells were 22.14% (V-OC = 727 mV, FF = 78.4%) and 21.38% (V-OC = 722 mV, FF = 77.1%) on n- and p-type FZ wafers, respectively, proving that heterojunction schemes can perform almost as well on high-quality p-type as on n-type wafers. To our knowledge, this is the highest efficiency ever reported for a full silicon heterojunction solar cell on a p-type wafer, and the highest V-OC on any p-type crystalline silicon device with reasonable FF.

引用

页码：83 / 89

页数：7

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&gt;21% Efficient Silicon Heterojunction Solar Cells on n- and p-Type Wafers Compared

>21% Efficient Silicon Heterojunction Solar Cells on n- and p-Type Wafers Compared