Cesium carbonate cs2co3

All materials were reagent
grade and were used as received. Lead iodide (PbI₂, >98%,
from TCI), cesium carbonate(Cs₂CO₃, >99%,
from
Sigma Aldrich), guanidinium acetate salt (GAOAc, >99%, from Sigma
Aldrich), oleic acid (OA, technical grade 90%), oleylamine (OLA, technical
grade 98% from Sigma Aldrich), 1-octadecene (1-ODE, technical grade
90% from Sigma Aldrich), hexane (reagent grade 97%), methyl acetate
(MeOAc, anhydrous 99.5% from Sigma Aldrich), 2-propanol (99.7% from
Carlo Erba), ethanol (96%) and acetone (99.25%) (from PanReac), hydrochloric
acid (HCl 37%), zinc powder (99.995%), PEDOT:PSS (Clevios 4083from
Heraeus), Al, lithium fluoride (LiF, from Lumtec), PO-T2T (from Lumtec),
and poly-TPD (from Lumtec) were used. EPOXY encapsulation (from Lumtec)
and indium tin oxide (ITO)-coated glass substrates (Pilkington TEC15,
∼15 Ω sq^–1) were also used.

The starting
compounds, i.e., 2-hydroxypyridine, 1-bromo-4-iodobenzene, 9,10-dihydroacridine,
1,10-phenanthroline, palladium acetate (Pd(CH₃COO)₂), tritert-butylphosphine (P(t-Bu)₃), copper, copper(I) chloride (CuCl), cesium carbonate
(Cs₂CO₃), potassium carbonate (K₂CO₃), and sodium chloride (NaCl), were purchased from
Sigma-Aldrich and used as received.

Cesium carbonate (Cs₂CO₃, Sigma-Aldrich, St. Louis, MO, USA, 99%), lead bromide (PbBr_2, Alfa Aesar, Haverhill, MA, USA, 99.9%), oleic acid (OA, Sigma-Aldrich, 90%), 1- octadecene (ODE, Sigma-Aldrich, 90%), oleylamine (OAM, Acros Organics, Waltham, MA, USA, 80–90%), parylene type C (Specialty Coating Systems, Indianapolis, IN, USA) and silane A174 (Sigma-Aldrich) were used as received from commercial sources.
Colloidal solutions of perovskite CsPbBr₃ NCs were prepared following the hot-injection method reported by Kovalenko et al., with minor modifications [15 (link)].

Cesium
carbonate (Cs₂CO₃, 99.9%, Sigma-Aldrich), antimony
acetate (Sb(ac)₃, 99.99%,
Sigma-Aldrich), cadmium acetate dihydrate (Cd(ac)₂·2H₂O, 98% analytical grade, Acros Organics), dioctyl ether (DoE,
99%, Sigma-Aldrich), hexane (Chem Lab NV), degassed oleylamine (OLAm,
80–90% C18 content, Acros Organics), oleic acid (OLAc, 90%,
Alfa Aesar), and benzoyl chloride (Bz-Cl, ACS reagent, Sigma-Aldrich)
were used without further purification.

Cellulose acetate (C₁₆₄H₁₇₄O₁₁₁, average M_n~30,000), cesium carbonate (Cs₂CO₃, 99%), lead(II) bromide (PbBr₂, 99.999% trace metal basis), 1-octadecene (ODE; C₁₈H₃₆, technical grade 90%), oleylamine (OLA; C₁₈H₃₇N, technical grade 70%) and hexane (C₆H₁₄) were purchased from Sigma-Aldrich Chemicals (St. Louis, MO, USA). N,N-dimethylacetamide (DMA; C₄H₉NO), acetone (C₃H₆O, 99.5%) and oleic acid (OA; C₁₈H₃₄O₂) were obtained from Daejung Chemicals & Metals Co., Ltd. (Siheung, Korea).

1-Bromo-2,3,5,6-tetrafluoro-4-(trifluoromethyl)benzene,
pyrimidine-5-boronic acid, pyrimidine-2-boronic acid, 2-methyl-4-cyanophenylboronic
acid, 2-pyridineboronic acid, and cesium carbonate (Cs₂CO₃) were purchased from Sigma-Aldrich. 3,6-Di-tert-butyl-9H-carbazole (tCz) were synthesized according to the previously reported procedure.^{16 (link)}