From iridium and platinum to copper and carbon: new avenues for more sustainability in organic light-emitting diodes

Abstract

In this article, we analyse materials and techniques used in OLED manufacturing in terms of sustainability and highlight upcoming trends which are supposed to further enhance this technologies sustainability.

Solid-State 63Cu, 65Cu, and 31P NMR Spectroscopy of Photoluminescent Copper(I) Triazole Phosphine Complexes

“…With this orientation for the CS tensor, the experimental Euler angles thus indicate that V XX and V YY are in the directions of A cc and A bb , respectively, as shown in Figure 7. Summary, [Cu(bptzH)(dppe)]ClO 4 (7). The EFG and CS tensors for 7 were characterized.…”

The beneficial effects of trifluoromethyl-substituents on the photoconversion efficiency of copper(i) dyes in dye-sensitized solar cells

“…. DSCs containing the fluorinated ancillary ligands exhibit photoconversion efficiencies of z30-34% relative to N719 set at 100%; this is a significant enhancement with respect to DSCs Introduction The replacement of rare elements by Earth-abundant metals in dye-sensitized solar cells (DSCs), 1,2 organic light-emitting diodes (OLEDs), 3,4 and light-emitting electrochemical cells (LECs) 5 is a high priority for developing sustainable materials chemistry. Although ruthenium, metal porphyrin-based and metal-free organic compounds are state-of-the-art dyes with photoconversion efficiencies reaching z12%, 6 the last few years have seen signicant progress in the use of copper(I) complexes in Grätzel-type 7 DSCs.…”

“…We were therefore prompted to consider different ways in which halo-substituents could be incorporated into the ancillary ligand in a [Cu(L anchor ) ( 4 ] (135 mg, 0.12 mmol) were added to a 10-20 ml vial, and the tube was then evacuated and relled with N 2 three times. Dry THF (5 ml) and a solution of 2-pyridylzinc bromide (0.5 M in THF, 7 ml, 3.50 mmol) were added, and then the tube was sealed, and heated in a microwave reactor at 110 C for 2 h. The reaction mixture was poured into a separating funnel and saturated aqueous NaHCO 3 was added.…”

Origin of a counterintuitive yellow light-emitting electrochemical cell based on a blue-emitting heteroleptic copper(i) complex

“…5,7,8,[17][18][19] Thus, the implementation of copper(I) complexes in lighting devices might provide an efficient way to reform the emitting singlets, i.e., singlet harvesting, increasing the spin statistics and the device efficiency. [1][2][3][4][5][6][7][8]19 Encouraged by the aforementioned, heteroleptic copper(I) complexes based on diimine (N^N) and diphosphine (P^P) ligands, i.e., [Cu(N^N)(P^P)] + , have been recently revisited by several groups. 2,9,12,14,17,18,20,21 They have established several simple guidelines for enhancing both the synthesis protocol 20,21 and the ligand design 2,17,18 to take full advantage of the photoluminescence and electrochemical features of these materials.…”

“…Copper(I) complexes are considered as a rising electroluminescent material for organic light-emitting diodes (OLEDs) [1][2][3][4][5][6][7][8] and light-emitting electrochemical cells (LECs). [9][10][11][12][13][14][15][16] This is attributed to their simple and low-cost synthesis, as well as the ease of chemical modifications for fine-tuning their photoluminescence and electrochemical features.…”