IEC TS 62972 pdf free download
IEC TS 62972 pdf free download.General lighting—Organic light emitting diode (OLED) products and related equipment—Terms and definitions.
5 Terms related to constructive elements
5.1 fluorescent emitter
emitter where only the singlet state excitons can show radiative decay and photon emission
Note 1 to entry: A fluorescent emitter is a type of emitter material. According to spin statistics in quantum chemistry, excitons formed by an electron and a hole can have two different spin multiplicities. i.e. 1 (singlet state) or 3 (triplet state). Simply spoken, 25 % of the states are singlets and 75 % are triplets. In a fluorescent emitter only the singlet state excitons can show radiative decay and photon emission. The theoretical maximum of the internal quantum efficiency is 25 %.
5.2 phosphorescent emitter
emitter where singlet and triplet state excitons can show radiative decay and photon emission
Note 1 to entry: A phosphorescent emitter is a type of emitter material. According to spin statistics in quantum chemistry, excitons formed by an electron and an electron hole can have two different spin multiplicities. i. e. I (singlet state) or 3 (triplet state). Simply spoken, 25 % of the states are singlets and 75 % are triplets. In a phosphorescent emitter singlet and triplet state excitons can show radiative decay and photon emission.
5.3 hybrid OLED stack
OLED stack that uses more than one kind of material and/or processing method
Note 1 to entry: A hybrid OLED stack can be as follows, for example:
a) an OLED stack which contains fluorescent and phosphorescent emitters,
b) an OLED stack which contains polymer and small molecule layers,
C) an OLED stack which combines solution-processed and evaporated organic layers.
[SOURCE: IEC 62341-1-2:2014, 2.2.16, modified — The terms “hybrid organic light emitting diode” and /“hybrid OLED” were replaced with “hybrid OLED stack”. The definition was modified to fit the term. List entry c) was added to the note.]
5.4 substrate
material to carry the OLED stack
Note 1 to entry: Most common is the use of glass, metal foils or polymer foils.
5.5 OLED stack
core element of an OLED to generate light, consisting of a multi-layer structure with significant lateral dimensions where each layer has a special functionality, the two sandwiching layers at top and bottom being electrodes for connection to a power supply and at least one of these electrodes being transparent to enable light extraction 5.6 anode <OLED stack> electrode from where holes are injected into the organic layers 5.7 cathode <OLED stack> electrode from where electrons are injected into the organic layers 5.8 hole injection layer HIL layer adjacent to the anode and designed to improve the hole injection Note 1 to entry: The HIL is part of the OLED stack. Note 2 to entry: This note applies to the French language only. 5.9 electron injection layer EIL layer adjacent to the cathode and designed to improve the electron injection Note 1 to entry: The EIL is part of the OLED stack. Note 2 to entry: This note applies to the French language only. 5.10 hole transport layer HTL layer inside the OLED stack with a relatively high mobility ot holes and used to adjust the charge carrier balance in the OLED stack Note I to entry: The special case of an electrically doped HTL for further conductivity increase is called p-HTL Note 2 to entry: This note applies to the French language only. 5.11 hole blocking layer HBL layer inside the OLED stack with a relatively low mobility of holes or difference of highest occupied molecular orbital level and used to adjust the charge carrier balance in the stack Note 1 to entry: This note applies to the French language only. 5.12 electron transport layer ETL layer inside the OLED stack with a relatively high mobility of electrons and used to adjust the charge carrier balance in the stack Note 1 to entry: The special case of an electrically doped ETL for further conductivity increase is called n-ETL. Note 2 to entry: This note applies to the French language only. 5.13 electron blocking layer EBL layer inside the OLED stack with a relatively low mobility of electrons and used to adjust the charge carrier balance in the OLED stack bond ElictrobctwlcW Cot,w,wWon by *4S undr Ilcens. w*h EC oduceon or n.tworkwig p.rmm.d w&otM bc.ris. mm IHS.IEC TS 62972 pdf free download.
