TY  - JOUR
AU  - Duan, Weiyuan
AU  - Bittkau, Karsten
AU  - Lambertz, Andreas
AU  - Qiu, Kaifu
AU  - Yao, Zhirong
AU  - Steuter, Paul
AU  - Qiu, Depeng
AU  - Rau, Uwe
AU  - Ding, Kaining
TI  - Improved Infrared Light Management with Transparent Conductive Oxide/Amorphous Silicon Back Reflector in High‐Efficiency Silicon Heterojunction Solar Cells
JO  - Solar RRL
VL  - 5
IS  - 3
SN  - 2367-198X
CY  - Weinheim
PB  - Wiley-VCH
M1  - FZJ-2021-01153
SP  - 2000576
PY  - 2021
AB  - To improve the infrared (IR) response, a high-refractive-index intrinsic amorphous silicon (a-Si:H) layer is introduced after metallization of bifacial silicon heterojunction (SHJ) solar cells, resulting in a transparent conductive oxide (TCO)/a-Si:H back reflector, which functions like distributed Bragg reflector (DBR). This concept is demonstrated by both Sentaurus Technology Computer-Aided Design (TCAD) simulation and experimental methods. The TCO/a-Si:H back reflector can increase rear internal reflectance by reducing the transmission loss, thus improving the IR external quantum efficiency. The using of Sn-doped In2O3 (ITO)/a-Si:H back reflector in >23.5% efficiency SHJ solar cells can improve short-circuit current density by 0.4 mA cm2 which is quite similar as using the more expensive ITO/Ag back reflector, while keeping a cell bifaciality of 55%. This brings its advantage for monofacial application case. Future studies would be nice to work on higher transparent back reflectors to broaden the application in bifacial case. This back-reflector design promotes IR response of SHJ solar cells with transferring to a wide variety of TCOs.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000616487200001
DO  - DOI:10.1002/solr.202000576
UR  - https://juser.fz-juelich.de/record/890730
ER  -