Designing Nonfullerene Acceptors with Oligo(Ethylene Glycol) Side Chains: Unraveling the Origin of Increased Open‐Circuit Voltage and Balanced Charge Carrier Mobilities
作者:Junjie Cui、Jung‐Hwa Park、Dong Won Kim、Min‐Woo Choi、Hae Yeon Chung、Oh Kyu Kwon、Ji Eon Kwon、Soo Young Park
DOI:10.1002/asia.202100660
日期:2021.9
Introducing oligo(ethyleneglycol) (OEG) chain into a dicyanodistyrylbenzene-based nonfullereneacceptor (NIDCS) increased its dielectric constant (ϵr) from 3.3 to 5.4. The new NIDCS acceptor (NIDCS-EO3) bearing two triethylene glycolchains showed improved open-circuit voltages (Voc) and power conversion efficiencies (PCEs) with various donors in bulk heterojunction organic solar cells.
Modular synthesis of asymmetric rylene derivatives
作者:Caitlin S. Sample、Eisuke Goto、Nisha V. Handa、Zachariah A. Page、Yingdong Luo、Craig J. Hawker
DOI:10.1039/c6tc05139a
日期:——
The modularsynthesis of asymmetric rylenes from naphthalic anhydride derivatives is presented. Imidization, Suzuki–Miyaura coupling and cyclodehydrogenation reactions are utilized for the generation of novel functional rylenes with these three core transformations providing significant flexibility over the final structure. The combination of simple purification and high yields enables access to asymmetric
An organic light-emitting display apparatus includes a substrate, an organic light-emitting device disposed above the substrate, and an encapsulation unit disposed above the organic light-emitting device and sealing the organic light-emitting device, wherein the encapsulation unit includes a compound represented by Formula 1.
[R
1
-(L
1
)
a1
]
b1
-(Ar
1
)
c1
-[(L
2
)
a2
-R
2
]
b2
. Formula 1
A novel small molecule acceptor of a naphthalimide terminated imide-fused benzothiadiazole derivative was developed for P3HT-based organic solar cells with a relatively high open-circuit voltage of 0.78 V.
Axially linked yrene‐naphthalimide fluorophores (N2Py, N4Py, and BNPy) exhibited push‐pull characteristics with intense fluorescence in solutions, strong solvatochromic behaviors, good thermal and electrochemical stabilities. The BNPy‐based OLED achieved the best EL performance with a maximum brightness of 3389 cd m−2, a maximum EQE of 3.98 %, a maximum LE of 3.22 cd A−1, and a low turn‐on voltage
轴向连接的yr-萘二甲酰亚胺荧光团(N2Py,N4Py和BNPy)具有推挽特性,在溶液中具有强烈的荧光,强溶剂化行为,良好的热稳定性和电化学稳定性。基于BNPy的OLED达到了最佳的EL性能,最大亮度为3389 cd m -2,最大EQE为3.98%,最大LE为3.22 cd A- 1,并且开启电压低至3.2 V.