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Query: EC:6.2.1.1 (
ACS
)
78,556
document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)
Cu(In,Ga)Se
2
(CIGS) is considered a promising photovoltaics material due to its excellent properties and high efficiency. However, the complicated deep defects (such as In
Cu
or Ga
Cu
) in the CIGS layer hamper the development of polycrystalline CIGS solar cells. Numerous efforts have been employed to passivate these defects which distributed in the grain boundary and the CIGS/CdS interface. In this work, we implemented an effective Ag substituting approach to passivate bulk defects in CIGS absorber. The composition and phase characterizations revealed that Ag was successfully incorporated in the CIGS lattice. The substituting of Ag could boost the crystallization without obviously changing the band gap. The C-V and EIS results demonstrated that the device showed enlarged W
d
and beneficial carrier transport dynamics after Ag incorporation. The
DLTS
result revealed that the deep In
Cu
defect density was dramatically decreased after Ag substituting for Cu. A champion Ag-substituted CIGS device exhibited a remarkable efficiency of 15.82%, with improved
V
OC
of 630 mV,
J
SC
of 34.44 mA/cm
2
, and FF of 72.90%. Comparing with the efficiency of an unsubstituted CIGS device (12.18%), a Ag-substituted CIGS device exhibited 30% enhancement.
ACS
Appl Mater Interfaces 2020 Mar 18
PMID:High Efficiency CIGS Solar Cells by Bulk Defect Passivation through Ag Substituting Strategy. 3210 86
