We have designed and synthesized two α-carboline-based host materials, 1,3-bis(9H-pyrido[2,3-b]indol-9-yl) benzene (mCaP), 2.6-bis(9H-pyrido[2,3-b]indol-9-yl) pyridine (26mCaPy) and two δ-carboline-based host materials, 1,3-bis(5H-pyrido[3,2-b]-indol-5-yl) benzene (mCdP), 2,6-bis(5H-pyrido[3,2-b]indol-5-yl)pyridine (26mCdPy). Their photophysical and electrochemical properties have been fully investigated. It has demonstrated that the photoluminescent quantum yields of δ-carboline-based materials are significanly superior to those of α-carboline-based materials. Carboline unit could coordinate with copper iodide (CuI) to form copper(I) (Cu(I)) complex by co-depositing. Co-deposited films of these carboline derivatives and CuI were fabricated as an emissive layer of the organic light-emitting diodes. Consequently, the device with co-depositing mCdP and CuI as an emitter gave a maximum current efficiency of 37.3 cd A⁻¹, a maximum power efficiency of 26.3 lm W⁻¹.

我们设计并合成了两种基于α-咔啉的主体材料，即1,3-双（9H-吡啶基[2,3 - b ]吲哚-9-基）苯（mCaP），2.6-双（9H-吡啶基[2] ，3 - b ]吲哚-9-基）吡啶（26mCaPy）和两种基于δ-咔啉的主体材料，1,3-双（5H-吡啶基[3,2 - b ]-吲哚-5-基）苯（ mCdP），2,6-bis（5H-pyrido [3,2- b]吲哚-5-基）吡啶（26mCdPy）。已对其光物理和电化学性质进行了充分研究。已经证明，基于δ-咔啉的材料的光致发光量子产率显着优于基于α-咔啉的材料的光致发光量子产率。碳环单元可与碘化铜（CuI）配位，通过共沉积形成铜（I）（Cu（I））配合物。这些碳氢化合物衍生物和CuI的共沉积膜被制成有机发光二极管的发射层。因此，将mCdP和CuI共同沉积作为发射极的器件给出的最大电流效率为37.3 cd A ^-1，最大功率效率为26.3 lm W ^-1。