Table 2 Comparison of hBN passivation with other 3D passivation layers.

From: Passivation of InP solar cells using large area hexagonal-BN layers

Passivation layer

Interface defect density (eV−1 cm−2)

Reference

2D hBN

2 × 1012

Present work

Al2O3

2.6 × 1012

25

HfO2

5.4 × 1012

25

TiO2

1.6 × 1012

26

SiO2

5 × 1012

27

SiNx

>1 × 1012

28