Home > information > News > 2021 > 【Paper】A paper related to Zhen-Li YAN san, who was an exchange student of STEP-YUFE (a short-period exchange program), and Assistant Professor Takayuki CHIBA (Kido/Sasabe/Chiba Lab) titled "Stable Blue Perovskite Light-Emitting Diodes Achieved by Optimization of Crystal Dimension through Zinc Bromide Addition" was published on Chemical Engineering Journal (IF: 10.652).

Information


Feb. 05, 2021 【Paper】A paper related to Zhen-Li YAN san, who was an exchange student of STEP-YUFE (a short-period exchange program), and Assistant Professor Takayuki CHIBA (Kido/Sasabe/Chiba Lab) titled "Stable Blue Perovskite Light-Emitting Diodes Achieved by Optimization of Crystal Dimension through Zinc Bromide Addition" was published on Chemical Engineering Journal (IF: 10.652).

A paper related to Zhen-Li YAN san, who was an exchange student of STEP-YUFE (a short-period exchange program), and Assistant Professor Takayuki CHIBA (Kido/Sasabe/Chiba Lab) titled "Stable Blue Perovskite Light-Emitting Diodes Achieved by Optimization of Crystal Dimension through Zinc Bromide Addition" was published on Chemical Engineering Journal (IF: 10.652).

 

 

-------

Title: Stable Blue Perovskite Light-Emitting Diodes Achieved by Optimization of Crystal Dimension through Zinc Bromide Addition


Zhen-Li Yan, Jean-Sebastien Benas, Chu-Chen Chueh, Wei-Cheng Chen, Fang-Cheng Liang, Zhi-Xuan Zhang, Bi-Hsuan Lin, Chun-Jen Su, Takayuki Chiba,* Junji Kido*, and Chi-Ching Kuo*

https://www.sciencedirect.com/science/article/pii/S1385894721003715#!

Abstract
Low-dimensional perovskites have been widely studied as a promising candidate for realizing stable light-emitting diodes (LEDs). However, blue-light-emitting devices generally possess low stability associated with gradually red-shifted emission. To overcome this issue, the effect of zinc bromide (ZnBr2) addition on the regulation of the crystal structures of phenethylammonium and bromine-chlorine mixed inorganic perovskites (PEA-CsPbBrxCl3-x) is investigated. With the ZnBr2 addition, low-dimensional perovskite structures undergo morphological changes, such as thickening of their crystal structures and higher degree of crystal arrangement. Stoichiometric selective characterization reveals that perovskite bonding forces changed from Van der Waals with PEA to ionic with ZnBr2. Meanwhile, ZnBr2 can effectively address the ion defect filling and dimensional structure property switching. Consequently, the optimized ZnBr2-assisted PEA-CsPbBrxCl3-x LED is shown to deliver a high luminance of 1245 cd/m2 along with a high external quantum efficiency of 1.30%. Furthermore, this blue LED exhibits excellent spectral stability, for which only 3-nm red-shift on external excitation (0.1 to 5.0 mA) is observed. Our result clearly shows that ZnBr2 addition effectively improves the stability of blue light-emitting perovskites.

 

 

 

📚 Kido/Sasabe/Chiba Lab HP >> https://oled.yz.yamagata-u.ac.jp/view.cgi?p=384
 

2021 List of News

Jul. 14, 2021
 News Release 
(Asahi) The news related to professor Junji KIDO titled "Professor Kido's research group made an investigation on energy metabolism when a person is slept, and found that OLED lighting in the bed room can improve the quality of sleep better than LED" was released.
Jul. 08, 2021
 Paper 
A paper related to Dr. Ryutaro KOMATSU, a graduate of Kido/Sasabe/Chiba lab, and Associate Professor Hisahiro SASABE titled "Bis(triphenylamine)benzodifuran Chromophores: Synthesis, Electronic Properties and Application in Organic Light-Emitting Diodes", was published on Frontiers in Chemistry (IF: 5.221).
Jul. 05, 2021
 TV Broadcast 
(YTS) A research result related to Professor Junji KIDO's research group titled "To get a deep sleep using OLED" was introduced in Yamagata Television (YTS).
Jul. 01, 2021
 Press Release 
The news related to a joint research result between professor Junji KIDO and professor Kunpei TOKUYAMA (University of Tsukuba) was released in a regular press conference of Yamagata University.
Jul. 01, 2021
 Information 
Professor Hiroshi ITO (Vice Dean of Faculty of Engineering), Professor Yoshihiro Ohba (Research Leader of COI) and Associate Professor Eiko INOUE (Academic-Industrial Collaboration) visited Yonezawa City Hall, and had a meeting with Vice Mayor and the charge persons of the department of Health and Welfare.
Jun. 29, 2021
 Information 
An open symposium "Active and Healthy Smart Communities with Organic Technology" will be held on July, 1st (online).
Jun. 28, 2021
 Paper 
A paper related to Hiroki ARAI, a 2nd-year doctoral student of Kido/Sasabe/Chiba lab, and Associate Professor Hisahiro SASABE titled "Asymmetric Spirobiacridine-based Delayed Fluorescence Emitters for High-performance Organic Light-Emitting Devices", was published on the Front Cover of Chemistry A European Journal (IF: 4.857) (Wiley).
Jun. 25, 2021
 News Release 
(Nikkan Kougyo) The news related to a joint research result between Ushiokemikkusu, CHIRACOL and Mituskami Lab about "an amplifier with organic semiconductor" was released on Nikkan Kougyo Shimbun and its web site on June 25.
Jun. 23, 2021
 News Release 
(Yamagata) The news related to professor Junji KIDO titled "Professor Kido gave a lecture to the 6th grade students of Yonezawa Nanbu Elementary School, and told them that Yonezawa city owns the world-first" was released.
Jun. 06, 2021
 News Release 
(Yomiuri) The news related to professor Junji KIDO receiving the 62th Fujihara Award was released on Yomiuri Shimbun on June, 6th.
Jun. 04, 2021
 News Release 
(Yamagata) The news related to professor Junji KIDO receiving the 62th Fujihara Award was released on Yamagata Shimbun on June, 4th.
Jun. 03, 2021
 Paper 
A paper related to project researcher Dr. Anubha Bilgaiyan and Associate Professor Makoto MIZUKAMI titled "Flexible, high mobility short-channel organic thin film transistors and logic circuits based on 4H-21DNTT" was published on Scientific Reports.
May 31, 2021
 Paper 
A paper related Guanting LIU, a 3rd doctoral student of Kido/Sasabe/Chiba lab, titled "Facile synthesis of multi-resonance ultra-pure-green TADF emitters based on bridged diarylamine derivatives for efficient OLEDs with narrow emission", was published on Journal of Materials Chemistry C (IF: 7.059) (Royal Society of Chemistry).
May 28, 2021
 Award 
Professor Junji KIDO received the 62th Fujihara Award from the Fujihara Foundation of Science that is an award to praise the researcher who contributes to the scientific-technological development. Also, Professor kido will give an interview at regular press conference of Yamagata University on June, 2.
May 19, 2021
 Paper 
A paper related a project researcher Subhash SINGH of Tokito/Kumaki/Senkine lab, titled "Flexible high-performance organic thin film transistors and PMOS inverters: Trap controlled grain boundaries and contact resistance effect in different channel length devices", was published on Synthetic Metals.
May 19, 2021
 Paper 
A paper related a project researcher Subhash SINGH (Tokito/Kumaki/Senkine lab), titled "Flexible Low-Voltage Organic Thin Film Transistors and PMOS Inverters: Effect of Channel Width on Noise Margin", was published on Journal of Physics D: Applied Physics.
May 19, 2021
 Paper 
A paper related a joint research between Tokito/Kumaki/Senkine lab and POSTECH (Korea), titled "Flexible and Printed Organic Nonvolatile Memory Transistor with Bilayer Polymer Dielectrics", was published on Advanced Materials Technologies.
May 10, 2021
 Lecture 
(July, 2nd) Professor Shizuo TOKITO will be invited as a guest speaker in Internal Laboratory Web Scientific Seminar (online) held by CEA (Commissariat à l’énergie atomique et aux énergies alternatives), and will have a lecture titled "Flexible and Printed Organic Sensors and IoT Applications".
May 10, 2021
 Lecture 
(June, 5th) Professor Shizuo TOKITO will be have a special lecture titled "Health Management and Medical Application of Flexible Organic Sensor" at 29th Meeting of Japanese Society of Physical Fitness and Sports Medicine (Tohoku Region).
May 10, 2021
 Lecture 
(June, 3rd) Professor Shizuo TOKITO will be invited as a guest speaker in International 3D, 4D Printing Online Seminar (zoom) held by KFPE (Korea Flexible & Printed Electronics Society), and will have a lecture titled "Flexible and Printed Organic Sensors and IoT Applications".
1 - 20 / 47
Prev 1 2 3 Next

PAGETOP