Table 1.
Cd:Se precursor ratios, position of the photoluminescence (PL) brightpoint during the nanocrystal (NC) synthesis; average spectral PL peak position, PL full width at half maximum (FWHM), and average PL quantum yield (QY) of utilized quantum dots (QDs); and average power conversion efficiency (PCE) of hybrid bulk heterojunction poly[2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b’]dithiophene)-alt-4,7-(2,1,3-benzothiadiazole)]:CdSe (BHJ PCPDTBT:CdSe) QD solar cells found for the optimal post-synthetic hexanoic acid washing time of CdSe QDs.
| Cd:Se Precursor Ratio | Brightpoint (min) | PL Peak Position (nm) | FWHM (nm) | PL QY (%) | Optimal HA Washing Time (min) | PCE with Optimal NC Treatment Time (%) |
|---|---|---|---|---|---|---|
| 3:2 | 17 | 647 ± 7 | 30.7 ± 0.8 | 24 ± 5 | 21 | 2.4 ± 0.10 |
| 2:2 | 21 | 650 ± 3 | 27.0 ± 0.7 | 25 ± 5 | 18 | 2.8 ± 0.18 |
| 2:3 | 60 | 646 ± 5 | 32.2 ± 0.9 | 37 ± 8 | 60 | 1.7 ± 0.04 |