研究目的
To investigate the use of HAT-CN/TAPC organic heterojunction (OHJ) as both charge generation layer (CGL) and charge injectors for fabricating high efficiency and long lifetime tandem organic light-emitting diodes (OLEDs).
研究成果
The use of HAT-CN/TAPC OHJs as both CGL and charge injectors significantly improves the efficiency and lifetime of tandem OLEDs. This approach provides a new route for the development of high performance OLEDs by achieving more balanced charge generation and injection.
研究不足
The study does not discuss the scalability of the fabrication process for industrial applications or the cost implications of using HAT-CN/TAPC OHJ in mass production.
1：Experimental Design and Method Selection:
The study employs HAT-CN/TAPC OHJ as both CGL and charge injectors in tandem OLEDs. The methodology involves the fabrication of OLEDs with and without OHJ as charge injectors to compare their performance.
2：Sample Selection and Data Sources:
The samples include red, orange, green, and blue tandem OLEDs based on HAT-CN/TAPC OHJ. Data on current density-luminance-voltage characteristics, luminance-current density, and efficiency-luminance characteristics were collected.
3：List of Experimental Equipment and Materials:
Materials used include HAT-CN, TAPC, Bepp2, Liq, Al, TCTA, and various emitters (RD071, Ir(ppy)2(acac), FIrpic, Ir(tptpy)2acac). Equipment includes a Keithley 2400 unit, LS-110 light intensity meter, and PR650 spectrometer.
4：Experimental Procedures and Operational Workflow:
The OLEDs were fabricated via thermal evaporation in a high vacuum condition. The deposition rates of each layer were monitored and controlled. The performance of the OLEDs was measured using specified equipment.
5：Data Analysis Methods:
The performance of the OLEDs was analyzed based on current density-luminance-voltage characteristics, efficiency-luminance characteristics, and lifetime measurements.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容-
Keithley 2400 unit
2400
Keithley
Used to measure the current density-luminance-voltage characteristics.
-
HAT-CN
Used as the n-type material of OHJ due to its suitable LUMO energy level.
-
TAPC
Served as the p-type material of OHJ and hole transport layer (HTL) due to its high hole mobility and proper HOMO energy level.
-
Bepp2
Selected as the electron transport layer (ETL) and host of red, green and orange emitters.
-
Liq
Used as the electron injection layer.
-
Al
Used as the cathode and to reduce the electron injection barriers from CGL and charge injector to ETL.
-
TCTA
Chosen as the electron blocking layer and host of red, green and orange emitters.
-
LS-110 light intensity meter
LS-110
Used to measure the luminance of the devices.
-
PR650 spectrometer
PR650
Used to collect the electroluminescence spectra of all devices.
-
登录查看剩余7件设备及参数对照表
查看全部
