An efficient solution-processable non-doped hybridized local and charge-transfer (HLCT) emitter for a simplified organic light-emitting diode

Abstract

Here, a new solution-processable hybridized local and charge-transfer (HLCT) fluorescent molecule, CPBzFC, is designed and synthesized as an efficient emitter for low-cost and simple-structured electroluminescent devices. CPBzFC contains 7-(4-(carbazol-N-yl)phenyl)benzothiadiazole as...

High Electrical Conductivity and Hole Transport in an Insightfully Engineered Columnar Liquid Crystal for Solution‐Processable Nanoelectronics

“…[ 17 ] The coexistence of these two states in 14PY can also be inferred from the fact that fluorescence quantum yield (PLQY) values in the highly polar solvents are quite comparable to those in less polar solvents (Table S2, Supporting Information). Since a CT state usually generates low PLQY values, [ 17,18 ] the higher‐than‐expected PLQY values of 14PY in polar solvents are an obvious result of the LE state contribution. The contribution of the LE state was also estimated from the time‐dependent DFT and natural transition orbital (NTO) studies for the first excited state using the B3LYP/6‐31G(d,p) function.…”

The emergence and prospects of carbon dots with solid-state photoluminescence for light-emitting diodes

“…Moreover, the host-guest blend system can experience phase separation and crystallization at high driving voltages, which can adversely affect the overall device performance. 17,25,26 In order to circumvent these demerits, undoubtedly, it is highly desirable to develop SSCD-based LEDs consisting of non-doped emissive layers. Specifically, employing single SSCDs as the emissive layer not only simplifies the device fabrication process but also maintains a homogeneous surface film morphology during device operation.…”

Achieving phthalide-based fluorescent materials with hybridized local and charge-transfer characteristics for efficient deep blue OLEDs

“…As a distinct way to utilize the triplet excitons, hot exciton materials mainly collect the triplet excitons via high-lying reverse intersystem crossing (hRISC) channels with a high RISC rate constant and greatly reduced the gathering of triplet excitons. [25][26][27][28][29][30] In such an approach, the S 1 and T 1 excited state could be adjusted to own weak CT properties, which allows for the selection of weak D and A moieties to construct materials with a high energy gap. [31][32][33][34][35] The relatively high rate constant of hRISC (T n -S 1 , n Z 2) and shortened lifetime of triplet exciton also lay the foundation for preparing relative OLEDs by a simple non-doping technology.…”