STACKED PHOTOVOLTAIC DEVICE AND PRODUCTION METHOD - LONGI GREEN ENERGY TECHNOLOGY CO LTD

Title:

STACKED PHOTOVOLTAIC DEVICE AND PRODUCTION METHOD

Document Type and Number:

WIPO Patent Application WO/2021/189860

Kind Code:

A1

Abstract:

A stacked photovoltaic device and a production method, relating to the field of photovoltaic technology. The stacked photovoltaic device comprises: an upper battery cell (1) and a lower battery cell (2), and a tunnel junction (3) located between the upper battery cell (1) and the battery cell (2); the lower battery cell (2) is a crystalline silicon cell; the tunnel junction (3) comprises: an upper crystalline silicon layer (31), a lower crystalline silicon layer (32) and an intermediate layer (33) located between the upper crystalline silicon layer (31) and the lower crystalline silicon layer (32); the upper crystalline silicon layer (31), the lower crystalline silicon layer (32) and the intermediate layer (33) are in direct contact, and the doping types of the upper crystalline silicon layer (31) and the lower crystalline silicon layer (32) are opposite; the doping concentration of the upper crystalline silicon layer (31) at the interface with the intermediate layer (33) and the doping concentration of the lower crystalline silicon layer (32) at the interface with the intermediate layer (33) are both greater than or equal to 1018cm -3; the intermediate layer (33) comprises at least one dielectric layer; and the dielectric layer has a band gap width greater than or equal to 3eV. The technical solution improves the efficiency of the stacked photovoltaic device, reduces the series resistance, and increases the peak tunneling current.

More Like This:

WO/2015/120169	MONOLITHIC MULTIJUNCTION POWER CONVERTER
JP5598818	Compound solar cell
WO/2020/205800	APPARATUS AND SYSTEMS FOR INCORPORATING EFFECTIVE TRANSPARENT CATALYST FOR PHOTOELECTROCHEMICAL APPLICATION

Inventors:

WU ZHAO (CN)
XU CHEN (CN)
LI ZIFENG (CN)

Application Number:

PCT/CN2020/126078

Publication Date:

September 30, 2021

Filing Date:

November 03, 2020

Export Citation:

Click for automatic bibliography generation Help

Assignee:

LONGI GREEN ENERGY TECHNOLOGY CO LTD (CN)

International Classes:

H01L31/0687

Foreign References:

CN101246926A	2008-08-20
CN105900248A	2016-08-24
US20120138132A1	2012-06-07
CN102244134A	2011-11-16

Other References: