公开(公告)号：US20180301662A1

公开(公告)日：2018-10-18

申请号：US15762245

申请日：2016-08-11

Applicant: Cambridge Display Technology Limited

Inventor： Philip Benzie ,  Colin Baker ,  Adam Strevens ,  William Young

IPC: H01L51/52 ,  H01L51/50

CPC classification number: H01L51/5265 ,  H01L51/504 ,  H01L51/5218 ,  H01L51/5234 ,  H01L2251/5315

Abstract: An organic light emitting device which emits white light in use, comprising a reflective anode (3), a first light emitting layer (9) which emits red light located over said anode, a second light emitting layer (11) which emits blue light and green light located over said first light emitting layer, and a cathode structure located over said second light emitting layer comprising a first semi-reflecting layer (15) and a second semi-reflecting layer (21) with a layer (19) of light transmissive material between the first and second semi-reflecting semi-transparent layers, the distance between the reflective anode (3) and the first semi-reflecting semi-transparent layer (17) being selected to form a micro-cavity which enhances blue light emission and red light emission from the device, and the distance between the reflective anode (3) and the second semi-reflecting semi-transparent layer (21) being selected to enhance green light emission from the device.

公开(公告)号：US20190033223A1

公开(公告)日：2019-01-31

申请号：US15752706

申请日：2016-08-19

Applicant: Molecular Vision Limited ,  Cambridge Display Technology Limited

Inventor： Chris Hand ,  Oliver Hofmann ,  Gihan Ryu ,  Miguel Ramon ,  Philip Benzie ,  Christopher John Kay

IPC: G01N21/84 ,  B01L3/00 ,  G01N33/558 ,  G01N21/64

Abstract: An assay device for the quantitative determination of the concentration of at least one analyte in a liquid sample. The device comprises a lateral flow membrane (46) comprising a plurality of test regions (41A, 41B) and formed from a light transmissive material, a plurality (44A, 44B) of planar organic light emitting diode (OLED) emitters comprising an emission layer of an organic electroluminescent material, and a plurality (49A, 49B) of planar organic photodetectors (OPDs) comprising an absorption layer of an organic photovoltaic material. Each test region comprises an immobilised component for retaining analyte tagging particles. Each test region is aligned with the emission layer of one emitter and the absorption layer of one photodetector. The aligned emitter, photodetector, and test region form a group such that the emitter is capable of illuminating the test region and the photodetector is capable of detecting light from the test region. For each group, under conditions where the test region is wet and devoid of tagging particles the energised photodetector photocurrent that is produced is denoted i1, when the group emitter is the only emitter that is energised, and T2 when the emitter of another group is additionally energised. Cross-talk (C), is then represented by the black arrows, and is defined according to the equation: C=20 log10 (i1/(i2−i1)) C is arranged to be greater than about 20 dB for at least one group of the device.

公开(公告)号：US20170150573A1

公开(公告)日：2017-05-25

申请号：US15322371

申请日：2015-06-19

Applicant: Cambridge Display Technology Limited

Inventor： Natasha M.J. Conway ,  Colin Baker ,  Philip Benzie ,  Alexander Doust ,  Niall MacCarthy

IPC: H05B33/08 ,  H01L51/52 ,  H01L27/32 ,  H01L51/50

CPC classification number: H01L51/5212 ,  H01L27/3244 ,  H01L51/5088 ,  H01L51/5209 ,  H01L2251/5361 ,  H01L2251/562 ,  H01L2251/564 ,  H05B33/0896 ,  Y02B20/36

Abstract: A method of increasing the lifetime of an ITO-free organic lighting system comprises: providing an organic lighting element having a substrate (12) bearing a set of anode electrode metal tracks (14), a conductive organic layer (16) over said metal tracks, an organic light emitting layer (18) over said conductive organic layer, and a cathode electrode layer (20) over said organic light emitting layer, wherein said metal comprises copper, and wherein said conductive organic layer comprises a doped conducting polymer, and driving the organic lighting element with a pulsed current drive. A biphasic pulse is employed having a first, on-phase with a defined current drive and a second, off-phase with a drive having a defined potential difference of zero volts across the lighting element. The anode electrode metal may have a higher work function than the cathode electrode layer. During said zero level drive portion the different work functions provide a reverse bias electric field within the organic lighting element.

公开(公告)号：US10770686B2

公开(公告)日：2020-09-08

申请号：US15762245

申请日：2016-08-11

Applicant: Cambridge Display Technology Limited

Inventor： Philip Benzie ,  Colin Baker ,  Adam Strevens ,  William Young

IPC: H01L51/52 ,  H01L51/50

Abstract: An organic light emitting device which emits white light in use, comprising a reflective anode (3), a first light emitting layer (9) which emits red light located over said anode, a second light emitting layer (11) which emits blue light and green light located over said first light emitting layer, and a cathode structure located over said second light emitting layer comprising a first semi-reflecting layer (15) and a second semi-reflecting layer (21) with a layer (19) of light transmissive material between the first and second semi-reflecting semi-transparent layers, the distance between the reflective anode (3) and the first semi-reflecting semi-transparent layer (17) being selected to form a micro-cavity which enhances blue light emission and red light emission from the device, and the distance between the reflective anode (3) and the second semi-reflecting semi-transparent layer (21) being selected to enhance green light emission from the device.

公开(公告)号：US20190036054A1

公开(公告)日：2019-01-31

申请号：US16071878

申请日：2017-01-18

Applicant: Cambridge Display Technology Limited

Inventor： Philip Benzie ,  William Young

IPC: H01L51/44 ,  H01L51/52 ,  H01L51/00

Abstract: The invention relates to a cathode layer stack used for semi-transparent organic photovoltaic devices with improved transmission of light in the visible wavelength range and excellent photovoltaic response. The cathode layer stack comprises an organic buffer layer (14b) deposited over a semi-transparent metal cathode (14c) and a silicon dioxide (SiO2) layer (14a) provided over the organic buffer layer (14b), wherein the refractive index of the silicon dioxide layer is lower than the refractive index of the buffer layer, and wherein the thickness of the silicon dioxide layer is less than 100 nm. In further embodiments, methods of manufacturing the cathode layer stack, organic photovoltaic devices comprising said cathode layer stack and uses thereof are described.