Ultrathin Cu(In,Ga)Se2 solar cells with Ag-based reflective back contacts

• We developed a highly reflective back contact for Cu(In,Ga)Se 2 solar cells based on silver encapsulated in a TCOs stack, compatible with substrate configuration. We demonstrated ultrathin (500 nm) Cu(In,Ga)Se 2 solar cells with 13.5% efficiency and state-of-the-art JSC=28.9 mA/cm2,2.7 mA/cm 2 more than the reference cell on molybdenum. We also demonstrated a 530 nm-thick (Ag, Cu)(In,Ga)Se 2 solar cell on Mo with state-of-the-art efficiency (14.9%) and remarkably high V OC (741 mV) and FF (81.8%). This result coupled with a highly reflective back contact for improved J SC , has the potential for a 500 nm-thick (Ag, Cu)(In,Ga)Se 2 solar cell with an 18% efficiency.

Ämnesord

NATURVETENSKAP  -- Fysik -- Annan fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Other Physics Topics (hsv//eng)

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)

TEKNIK OCH TEKNOLOGIER  -- Naturresursteknik -- Energisystem (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Environmental Engineering -- Energy Systems (hsv//eng)

Nyckelord

Ultrathin Cu(In

Ga)Se2

(Ag

Cu)(In

Ga)Se2

light trapping

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