Table 6: Parameters that were used to model solar cells (A–C) with PC1D before and after deposition of a white paint back reflector. In the latter case, the back surface reflectance was chosen to be diffuse rather than specular as in the nonpainted case.

Without paintWith paint
Parameter Unit ABCABC

Emitter thickness (nm)330 210 230 330 210 230
Emitter doping density
Emitter diffusion length(nm)146 90 110 146 90 110
Base thickness (nm)1900 20002000190020002000
Base doping density
Base diffusion length 4 1.55 1.1 5 1.55 1.25
Base minority carrier lifetime (ns)5.2 0.9 0.51 8.1 0.9 0.66
BSF thickness(nm)100100100100100100
BSF doping density
BSF diffusion length(nm)505050505050
Ext. reflectance layer 1: thickness; (nm)
Ext. reflectance layer 2: thickness, (nm)
Ext. reflectance layer 3: thickness, (nm)71; 1.90 68; 1.95 68; 1.93 71; 1.90 68; 1.95 68; 1.93
Int. front surface reflectance(%)555151515
Int. back surface reflectance(%)28 (spec.) 28 (spec.) 30 (spec.) 70 (diff.) 70 (diff.) 70 (diff.)