Results 31 to 40 of about 3,715 (146)

Microcavity enhanced single photon emission from an electrically driven site-controlled quantum dot [PDF]

, 2012
In this work we report on the integration of single site-controlled quantum dots (SCQDs) into electrically driven micropillar cavities. The electroluminescence of these devices features emission of single SCQDs with inhomogeneous broadenings down to 170 ...
Forchel, A., C. Schneider, A. Huggenberger, A. Forchel, T. A. Niederstrasser, Huggenberger, A., Reitzenstein, S., S. Reitzenstein, Höfling, Sven, Schneider, C., S. Höfling, Heindel, T., T. Heindel, M. Kamp, Kamp, M., Niederstrasser, T. A.   +15 more
core   +1 more source

Transparent Perovskite Light‐Emitting Diodes with Conductive Oxide Top Electrodes

Advanced Materials, EarlyView.
Transparent perovskite light‐emitting diodes (TrPeLEDs) enable simultaneous display and transparency, expanding application possibilities. Using a metal oxide buffer layer and pulsed laser deposition, TrPeLEDs with diverse compositions and architectures are demonstrated.
Michele Forzatti, Sergio Martínez‐Saiz, Morena Cervino, Edoardo Stanzani, Sandra Jenatsch, Qingsen Zeng, Joo Sung Kim, Dong‐Hyeok Kim, Eojin Yoon, Tae‐Woo Lee, Daniel Tordera, Henk J. Bolink   +11 more
wiley   +1 more source

When Poor Exciton Dissociation Limits Photocurrents in Organic Solar Cells: Why Low Offset Non‐Fullerene Acceptor Blends Can't Be Efficient

Advanced Materials, EarlyView.
The energetic offset between the donor and the acceptor components in organic photoactive layers is central to the tradeoff between photovoltage and photocurrent losses. This Perspective covers the most important issues surrounding this topic in non‐fullerene acceptor blends, from the difficulty of accurately determining state energies and driving ...
Dieter Neher, Manasi Pranav
wiley   +1 more source

Electrically Driven InAs Quantum-Dot Single-Photon Sources [PDF]

, 2009
Electrically driven single photon source based on single InAs quantum dot (QDs) is demonstrated. The device contains InAs QDs within a planar cavity formed between a bottom AlGaAs/GaAs distributed Bragg reflector (DBR) and a surface GaAs-air interface ...
Dou XM, Huang SS, Xiong YH, Ni HQ, Sun BQ, Xia JB, Niu ZC, Niu ZC Chinese Acad Sci Inst Semicond State Key Lab Superlattices & Microstruct POB 912 Beijing 100083 Peoples R China. E-mail Address: zcniu@red.semi.ac.cn, Du Y   +8 more
core  

High Efficiency 3‐Tandem Top Emitting Pure‐Blue OLEDs Beyond the BT.2020 Blue Standard

Advanced Optical Materials, EarlyView.
We report a high‐efficiency ultrapure‐blue 3‐tandem TEOLED through synergistic optimization of a narrowband MR‐TADF emitter, Purcell‐based cavity design, and pure Ag cathode/CPL structure. The optimized device achieves 463 nm emission, an ultranarrow FWHM of 10 nm, CIE y of 0.040, and a blue index of 1,596 cd/A/y, surpassing the BT.2020 blue standard ...
Jun Hyeog Oh, Se Chan Cha, Hyunmin Cho, Hyeong Geun Jo, Nisha Vergineya S, Jang Hyuk Kwon   +5 more
wiley   +1 more source

Single-photon emission from single-electron transport in a SAW-driven lateral light-emitting diode [PDF]

, 2021
: The long-distance quantum transfer between electron-spin qubits in semiconductors is important for realising large-scale quantum computing circuits. Electron-spin to photon-polarisation conversion is a promising technology for achieving free-space or ...

core   +2 more sources

Fluorescence Tuning of Carbon Dots from Red to Blue via UV‐Induced Photochemical Etching

Advanced Science, EarlyView.
A UV‐driven photochemical process enables continuous color evolution of carbon dots from red to blue using a single irradiation parameter. Progressive photoetching restructures graphitic domains and surface states, allowing full visible‐spectrum emission control.
Nanzhi Zheng, Yuchen Yang, Jingwei Xu, Jincheng Gan, Yinuo An, Xinyu Li, Guohua Chen   +6 more
wiley   +1 more source

Electroluminescence from single crystal Cu₂O diodes [PDF]

, 1979
We have measured the infrared electroluminescence in different types of single crystal Cu2O–Cu diodes under forward bias at various temperatures. Diodes which showed double-injection current-voltage characteristics in previous studies showed transient ...
T. Keowsim, F. L. Weichman, K. T. Chee
core   +1 more source

Mixed‐Polymer Hole Transport Layers Reinforce Au‐Anode Top Emitting Perovskite Light Emitting Diodes

Advanced Science, EarlyView.
Au‐anode corrosion is shown to occur rapidly under voltage bias in MAPbI3 perovskite LEDs. Resulting Au+ migration quickly leads to device shorting and unstable emission during constant current driving. We demonstrate that using a simple mixed‐polymer hole transport layer containing polyTPD and PVK can reduce Au‐corrosion and stabilize LED operation ...
James C. Loy, Jisu Hong, Tuo Hu, Xu He, Antoine Kahn, Barry P. Rand   +5 more
wiley   +1 more source

Electrically-driven single-photon sources based on colloidal quantum dots with near-optimal antibunching at room temperature [PDF]

, 2017
Photonic quantum information requires high-purity, easily accessible, and scalable single-photon sources. Here, we report an electrically driven single-photon source based on colloidal quantum dots. Our solution-processed devices consist of isolated CdSe/
Xingliang Dai, Yizheng Jin, Limin Tong, Wei Fang, Yuan Niu, Xiaogang Peng, Yunzhou Deng, Xing Lin, Chaodan Pu   +8 more
core   +1 more source