Improved Efficiency of Graphene/Si Heterojunction Solar Cells by Optimizing Hydrocarbon Feed Rate

Table 1

Characteristics of G/Si solar cells based on different graphene samples before and after HNO₃ treatment.

Samples	𝑉oc (mV)	𝐽sc (mA/cm^2)	FF (%)	𝜂 (%)
AC-0.01-original	472.4	15.57	30.78	2.26
AC-0.01-HNO3	532.7	15.23	61.27	4.98
AC-0.02-original	427.2	15.00	32.83	2.10
AC-0.02-HNO3	487.5	15.99	53.75	4.19
AC-0.04-original	427.2	12.07	19.69	1.02
AC-0.04-HNO3	480.0	13.59	31.26	2.04
AC-0.06-original	450.0	11.79	17.78	0.94
AC-0.06-HNO3	502.6	15.56	22.28	1.74