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Liftoff process for exfoliation of thin film photovoltaic devices and back contact formation

Patent ·
OSTI ID:1432813
A method for forming a back contact on an absorber layer in a photovoltaic device includes forming a two dimensional material on a first substrate. An absorber layer including Cu--Zn--Sn--S(Se) (CZTSSe) is grown over the first substrate on the two dimensional material. A buffer layer is grown on the absorber layer on a side opposite the two dimensional material. The absorber layer is exfoliated from the two dimensional material to remove the first substrate from a backside of the absorber layer opposite the buffer layer. A back contact is deposited on the absorber layer.
Research Organization:
International Business Machines Corporation, Armonk, NY (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
EE0006334
Assignee:
International Business Machines Corporation, Armonk, NY
Patent Number(s):
9,935,214
Application Number:
14/880,808
OSTI ID:
1432813
Country of Publication:
United States
Language:
English

References (3)

Layer-Resolved Graphene Transfer via Engineered Strain Layers journal October 2013
GaSe Formation at the Cu(In,Ga)Se2/Mo Interface-A Novel Approach for Flexible Solar Cells by Easy Mechanical Lift-Off journal May 2014
Package-Free Flexible Organic Solar Cells with Graphene top Electrodes journal April 2013

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