Table 1 PV parameters of state-of-the-art (A)CIGS solar cells from the literature

From: High-concentration silver alloying and steep back-contact gallium grading enabling copper indium gallium selenide solar cell with 23.6% efficiency

 

VOC (mV)

JSC (mA cm−2)

FF (%)

η (%)

EG (eV) from dEQE/dE

(First) Buffer

Heavy alkali

Ag addition

EMPAa

764

37.4

77.8

22.19

1.154

CdS

RbF

Yes (AAC = 0.02)

ZSW

741

37.8

80.6

22.6

1.137

CdS

RbF

No

SF 2017

746

38.5

79.7

22.92

1.13

CdS

CsF

No

SF 2019

734

39.6

80.4

23.35

1.08

Zn(O,S)

CsF

Yes (AAC < 0.04)

This work

767

38.3

80.5

23.64

1.130

CdS

RbF

Yes (AAC = 0.19)

  1. aEMPA record device does not use glass substrate, but flexible polymer foil.
  2. Externally certified solar cell parameters of the best devices from other research institutes2,3,4. EMPA data were kindly provided through personal communication with R. Carron; EG values for the ZSW data were kindly provided through personal communication with W. Witte. The respective EG values (all from dEQE/dE), used buffer layers in contact to the absorbers (sometimes multiple buffers were implemented), types of heavy alkali PDT and whether Ag was alloyed to the absorber are also listed.
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