TY - JOUR
T1 - Small Molecule Approach to Passivate Undercoordinated Ions in Perovskite Light Emitting Diodes
T2 - Progress and Challenges
AU - Lee, Ji Yeong
AU - Kim, Seo Yeon
AU - Yoon, Hyo Jae
N1 - Funding Information:
J.Y.L. and S.Y.K. contributed equally to this work. This research was supported by the NRF of Korea (NRF‐2019R1A2C2011003, NRF‐2019R1A6A1A11044070, and NRF‐2021M3F3A2A03017999).
Funding Information:
J.Y.L. and S.Y.K. contributed equally to this work. This research was supported by the NRF of Korea (NRF-2019R1A2C2011003, NRF-2019R1A6A1A11044070, and NRF-2021M3F3A2A03017999).
Publisher Copyright:
© 2021 Wiley-VCH GmbH.
PY - 2022/1/4
Y1 - 2022/1/4
N2 - Perovskite light-emitting diodes (PeLEDs) hold promise for the development of next-generation display and light technologies; however, various problems related to factors such as external quantum efficiency (EQE), long-term stability, and dependence on toxic species hinder their successful debut in display and lighting markets. Research on PeLEDs involving the small-molecule approach—the incorporation of small organic molecules into or onto active perovskite layers in PeLEDs for mitigating the aforementioned issues—has burgeoned in the last eight years. This review covers recent advances and challenges in the small-molecule approach by i) surveying the chemical structures used in the small-molecule approach, ii) summarizing the methods of molecular insertion into PeLED devices, iii) comprehensively discussing the effects of small-molecule-based interfacial engineering and passivation of undercoordinated metal and halide ions on the photophysical functions of devices and their mechanisms, iv) emphasizing the small-molecule-induced enhanced performance of devices in the context of long-term stability and EQE, and v) providing perspectives and discussing challenges for future research.
AB - Perovskite light-emitting diodes (PeLEDs) hold promise for the development of next-generation display and light technologies; however, various problems related to factors such as external quantum efficiency (EQE), long-term stability, and dependence on toxic species hinder their successful debut in display and lighting markets. Research on PeLEDs involving the small-molecule approach—the incorporation of small organic molecules into or onto active perovskite layers in PeLEDs for mitigating the aforementioned issues—has burgeoned in the last eight years. This review covers recent advances and challenges in the small-molecule approach by i) surveying the chemical structures used in the small-molecule approach, ii) summarizing the methods of molecular insertion into PeLED devices, iii) comprehensively discussing the effects of small-molecule-based interfacial engineering and passivation of undercoordinated metal and halide ions on the photophysical functions of devices and their mechanisms, iv) emphasizing the small-molecule-induced enhanced performance of devices in the context of long-term stability and EQE, and v) providing perspectives and discussing challenges for future research.
UR - http://www.scopus.com/inward/record.url?scp=85118313141&partnerID=8YFLogxK
U2 - 10.1002/adom.202101361
DO - 10.1002/adom.202101361
M3 - Review article
AN - SCOPUS:85118313141
VL - 10
JO - Advanced Optical Materials
JF - Advanced Optical Materials
SN - 2195-1071
IS - 1
M1 - 2101361
ER -