| 1 |
Silicon wafers cut by diamond wire |
Purchased from Trina Solar Co |
| 2 |
Ag nanoparticles deposition |
Samples were immersed in the AgNO3 (0.02 mol L−1)/HF (4 mol L−1) solution for 10 s |
| 3 |
Nanopores etching |
Samples were immersed in the HF (5.4 mol L−1)/H2O2 (3.5 mol L−1) solution for 1 min |
| 4 |
Rounding treatment |
Samples were immersed in the KOH (0.04 mol L−1)/NaF (0.16 mol L−1)/isopropyl alcohol (IPA, 5 vol%) solution for rounding treatment for 5–40 min at 35 °C |
| 5 |
Mark filled |
Samples were coated with a mixed solution of IPA + ethylene glycol monophenyl ether (KL-EPH) |
| 6 |
Hydrophilic treatment |
A mixed solution of NH3 H2O (15 vol%)/H2O2 (15 vol%)/H2O was used for hydrophilic treatment for 0–10 min |
| 7 |
Performance measurement |
Radiative cooling performance (outdoor, clear night, 23 ± 1 °C, RH 75% ± 5%) and water contact performance (sliding angle and contact angle) were measured |
| 8 |
AWH measurement |
AWH measurement was carried out outdoors on a wind-free sunny day. (0–24 h, 25 ± 2 °C, RH 75% ± 5%, wind speeds 0.4 ± 0.1 m s−1, dew points 17 ± 1 °C) |
