Photovoltaic performance determining parameters of different CEs.

Sample	J SC (mA cm−2)	V OC (V)	FF (%)	PCE, η (%)
o-MWCNT	14.08	0.55	29	2.24
o-MWCNT/N-CD (5 wt%)	17.24	0.71	35	4.28
o-MWCNT/N-CD (10 wt%)	16.07	0.73	34	3.98
o-MWCNT/N-CD (15 wt%)	14.96	0.73	28	3.05
o-MWCNT/N-CD (50 wt%)	4.19	0.43	25	0.45
Pt	16.49	0.48	41	3.17
o-MWCNT/NB-CD (10 wt%)	14.31	0.65	29	3.06
o-MWCNT/NS-CD (10 wt%)	15.37	0.74	33	3.49
o-MWCNT/NBS-CD (10 wt%)	14.74	0.73	31	3.33