Toward a planar black silicon technology for 50 μm-thin crystalline silicon solar cells.
Auger and surface recombinations are major drawbacks that deteriorate a photon-to-electron conversion efficiencies in nanostructured (NS) Si solar cells. As an alternative to conventional frontside nanostructuring, we report how backside nanostructuring is beneficial for carrier collection during photovoltaic operation that utilizes a 50-μm-thin wafer. Ultrathin (4.3-nm-thin) zinc oxide was also effective for providing passivated tunneling contacts at the nanostructured backsides, which led to the enhancement of 24% in power conversion efficiency.
Jae-Won
JW
Song
Yoon-Ho
YH
Nam
Min-Joon
MJ
Park
Bongyoung
B
Yoo
Jun-Sik
JS
Cho
Ralf B
RB
Wehrspohn
Jung-Ho
JH
Lee