Octylamine

Poly-TPD (average molecular weight, ~60,000 g mol⁻¹) was purchased from Xi’an polymer light technology Corp. PVK (average molecular weight, 25,000–50,000 g mol⁻¹), sulfur (99.98%), zinc acetate dihydrate (98%), 2-ethylhexanethiol (97%) and oleylamine (70%) were purchased from Sigma Aldrich. Octylamine (98%), tri-octylphosphine (TOP, 97%), cadmium acetate (98%), magnesium acetate hydrate (98%), benzoyl peroxide (BPO, 97%, dry wt.), 1-octadecene (ODE, 90%) and oleic acid (90%) were purchased from Alfa-Aesar. Chlorobenzene (extra dry, 99.8%), m-xylene (extra dry, 99%), octane (extra dry, >99%), ethanol (extra dry, 99.5%), tetrahydrofuran (THF, 99.9%, anhydrous) and decanoic acid (99%) were purchased from Acros. Dimethyl sulphoxide (DMSO, HPLC grade) and ethyl acetate (HPLC grade) were purchased from J&K Chemical Ltd. 1-Ethyl-3-methylimidazolium Bis(trifluoromethanesulfonyl)imide (EMI-TFSI, 98%) and Ferrocene (98%) were purchased from Energy Chemical. Red CdSe/CdZnSe/CdZnS core/shell/shell QDs and blue CdSeS/ZnSeS/ZnS core/shell/shell QDs were purchased from Najing technology Co., Ltd.

Copper(II) formate tetrahydrate (98%, Alfa Aesar, Haverhill, MA, USA), methyl alcohol (99.8%, Duksan Reagents, Ansan, Korea), isopropyl alcohol (IPA, 99.8%, Daejung Chemicals & Metals Co., Siheung, Korea), 2-amino-2-methyl-1-propanol (AMP; 95%, Acros Organics, Waltham, MA, USA), octylamine (99%, Alfa Aesar), and hexanoic acid (98%, Alfa Aesar) were used to synthesize Cu MOD ink (Cuf-AMP-OH). All reagents were used as received without further purification.