# US 2017/0288162 A1 · Organic el element > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0288162 A1 - Document ID: US20170288162A1 - Status: Published application - Kind: A1 - Application number: 15/472,427 - Filed: 2017-03-29 - Published: 2017-10-05 - Earliest claimed: 2016-03-30 - Assignees: Joled Inc.; Japan Display Inc. - Applicants: Joled Inc.; Japan Display Inc. - Inventors: Toshiyuki AKIYAMA; Kosuke MISHIMA; Takahiro KOMATSU - Web page: https://patentgrep.com/patent/US20170288162A1 ## CPC - H10K 50/11: characterised by the electroluminescent [EL] layers - H10K 50/15: Hole transporting layers - H10K 50/16: Electron transporting layers - H10K 2101/30: Highest occupied molecular orbital [HOMO], lowest unoccupied molecular orbital [LUMO] or Fermi energy values - H10K 2101/40: Interrelation of parameters between multiple constituent active layers or sublayers, e.g. HOMO values in adjacent layers - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract ΔE1 denoting difference between LUMO energy level of hole transport and LUMO energy level of light-emitting layer, μe1 denoting electron mobility of the hole transport layer, and μe2 denoting electron mobility of the light-emitting layer satisfy μ   e   1 μ   e   2 × exp  ( - Δ   E   1 × 38.681731 ) ≤ 2.090 × 10 - 2 when    μ   e   1 < μ   e   2 ,  and   satisfy exp  ( - Δ   E   1 × 38.681731 ) ≤ 2.090 × 10 - 2 when    μ   e   1 ≥ μ   e   2 , ΔE2 denoting difference between LUMO energy level of light-emitting layer and LUMO energy level of electron transport layer, μe2 denoting electron mobility of light-emitting layer, and μe3 denoting electron mobility of electron transport layer satisfy μ   e   2 μ   e   3 × exp  ( - Δ   E   2 × 38.681731 ) ≤ 4.367 × 10 - 4 when    μ   e   2 < μ   e   3 ,  and   satisfy exp  ( - Δ   E   2 × 38.681731 ) ≤ 4.367 × 10 - 4 when    μ   e   2 ≥ μ   e   3 , and ΔH denoting difference between HOMO energy level of light-emitting layer and HOMO energy level of electron transport layer, μh2, and μh3 denoting hole mobility of electron transport layer satisfy μ   h   3 μ   h   2 × exp  ( - Δ   H × 38.681731 ) ≤ 2.090 × 10 - 2 when    μ   h   3 < μ   h   2 ,  and   satisfy exp  ( - Δ   H × 38.681731 ) ≤ 2.090 × 10 - 2 when    μ   h   3 ≥ μ   h   2. ## Claims ### Claim 1 An organic electroluminescence (EL) element comprising: an anode; a hole transport layer above the anode, the hole transport layer containing a first organic semiconductor; a light-emitting layer on the hole transport layer, the light-emitting layer containing a second organic semiconductor; an electron transport layer on the light-emitting layer, the electron transport layer containing a third organic semiconductor; and a cathode above the electron transport layer, wherein the first organic semiconductor, the second organic semiconductor, and the third organic semiconductor each have a highest occupied molecular orbital (HOMO) and a lowest unoccupied molecular orbital (LUMO), the second organic semiconductor has higher electron mobility than hole mobility, ΔE1 denoting a difference [eV] between a LUMO energy level of the first organic semiconductor and a LUMO energy level of the second organic semiconductor, μe1 denoting an electron mobility of the first organic semiconductor, and μe2 denoting an electron mobility of the second organic semiconductor s  atisfy μ   e   1 μ   e   2 × exp  ( - Δ   E   1 × 38.681731 ) ≤ 2.090 × 10 - 2  when   μ   e   1 < μ   e   2 ,  and  satisfy  exp  ( - Δ   E   1 × 38.681731 ) ≤ 2.090 × 10 - 2 when   μ   e   1 < μ   e   2 , ΔE2 denoting a difference [eV] between the LUMO energy level of the second organic semiconductor and a LUMO energy level of the third organic semiconductor, μe2, and μe3 denoting an electron mobility of the third organic semiconductor satisfy μ   e   2 μ   e   3 × exp  ( - Δ   E   2 × 38.681731 ) ≤ 4.367 × 10 - 4  when   μ   e   2 < μ   e   3 ,  and  satisfy exp  ( - Δ   E   2 × 38.681731 ) ≤ 4.367 × 10 - 4 when μe2≧μe3, and ΔH denoting a difference [eV] between a HOMO energy level of the second organic semiconductor and a HOMO energy level of the third organic semiconductor, μh2 denoting a hole mobility of the second organic semiconductor, and μh3 denoting a hole mobility of the third organic semiconductor satisfy μ   h   3 μ   h   2 × exp  ( - Δ   H × 38.681731 ) ≤ 2.090 × 10 - 2  when   μ   h   3 < μ   h   2 ,  and  satisfy exp  ( - Δ   I   I × 38.681731 ) ≤ 2.090 × 10 - 2 when   μ   h   3 ≥ μ   h   2. ### Claim 2 (depends on 1) The organic EL element of claim 1, wherein Δ   E   2 ,  μ   e   2 ,  and   μ   e   3 satisfy 3.984 × 10 - 9 ≤ μ   e   2 μ   e   3 × exp  ( - Δ   E   2 × 38.681731 ) ≤ 4.367 × 10 - 4  when   μ   e   2 < μ   e   3 ,  and  satisfy 3.984 × 10 - 9 ≤ exp  ( - Δ   E   2 × 38.681731 ) ≤ 4.367 × 10 - 4  when   μ   e   2 < μ   e   3. ### Claim 3 (depends on 2) The organic EL element of claim 2, wherein Δ   E   2 ,  μ   e   2 ,  and   μ   e   3 satisfy 1.295 × 10 - 7 ≤ μ   e   2 μ   e   3 × exp  ( - Δ   E   2 × 38.681731 ) ≤ 3.406 × 10 - 7  when   μ   e   2 < μ   e   3 ,  and  satisfy 1.295 × 10 - 7 ≤ exp  ( - Δ   E   2 × 38.681731 ) ≤ 3.406 × 10 - 7  when   μ   e   2 < μ   e   3. ### Claim 4 (depends on 1) The organic EL element of claim 1, wherein Δ   E   1 ,  μ   e   1 ,  and   μ   e   2 satisfy 4.367 × 10 - 4 ≤ μ   e   1 μ   e   2 × exp  ( - Δ   E   1 × 38.681731 ) ≤ 2.090 × 10 - 2  when   μ   e   1 < μ   e   2 ,  and  satisfy 4.367 × 10 - 4 ≤ exp  ( - Δ   E   1 × 38.681731 ) ≤ 2.090 × 10 - 2 when   μ   e   1 ≥ μ   e   2.  ### Claim 5 (depends on 1) The organic EL element of claim 1, wherein Δ   H , μ   h   2 ,  and   μ   h   3 satisfy 4.367 × 10 - 4 ≤ μ   h   3 μ   h   2 × exp  ( - Δ   H × 38.681731 ) ≤ 2.090 × 10 - 2 when   μh   3 < μ   h   2 , and satisfy 4.367 × 10 - 4 ≤ exp  ( - Δ   H × 38.681731 ) ≤ 2.090 × 10 - 2 when   μ   h   3 ≥ μ   h   2. ### Claim 6 An organic electroluminescence (EL) element comprising: an anode; a hole transport layer above the anode, the hole transport layer containing a first organic semiconductor; a light-emitting layer on the hole transport layer, the light-emitting layer containing a second organic semiconductor; an electron transport layer on the light-emitting layer, the electron transport layer containing a third organic semiconductor; and a cathode above the electron transport layer, wherein the first organic semiconductor, the second organic semiconductor, and the third organic semiconductor each have a highest occupied molecular orbital (HOMO) and a lowest unoccupied molecular orbital (LUMO), the second organic semiconductor has higher hole mobility than electron mobility, ΔH1 denoting a difference [eV] between a HOMO energy level of the third organic semiconductor and a HOMO energy level of the second organic semiconductor, μh3 denoting a hole mobility of the third organic semiconductor, and μh2 denoting a hole mobility of the second organic semiconductor satisfy μ   h   3 μ   h   2 × exp ( - Δ   H   1 × 38.681731 ≤ 2.090 × 10 - 2   when    μ   h   3 < μ   h   2 ,  and   satisfy   exp  ( Δ   H   1 × 38.681731 ) ≤ 2.090 × 10 - 2   when    μ   h   3 < μ   h   2 , ΔH2 denoting a difference [eV] between the HOMO energy level of the second organic semiconductor and a HOMO energy level of the first organic semiconductor, μh2, and μh1 denoting a hole mobility of the first organic semiconductor satisfy μ   h   2 μ   h   1 × exp  ( - Δ   H   2 × 38.681731 ) ≤ 4.367 × 10 - 4 when    μ   h   2 < μ   h   1 ,  and satisfy exp  ( - Δ   H   2 × 38.681731 ) ≤ 4.367 × 10 - 4 when    μ   h   2 ≥ μ   h   1 , and ΔE denoting a difference [eV] between a LUMO energy level of the second organic semiconductor and a LUMO energy level of the first organic semiconductor, μe2 denoting an electron mobility of the second organic semiconductor, and μe1 denoting an electron mobility of the first organic semiconductor satisfy μ   e   2 μ   e   1 × exp  ( - Δ   E × 38.681731 ) ≤ 2.090 × 10 - 2 when    μ   e   1 < μ   e   2 ,  and satisfy exp  ( - Δ   E × 38.681731 ) ≤ 2.090 × 10 - 2 when    μ   e   1 ≥ μ   e   2. ### Claim 7 (depends on 6) The organic EL element of claim 6, wherein Δ   H   2 , μ   h   2 ,  and   μ   h   1 satisfy 3.984 × 10 - 9 ≤ μ   h   2 μ   h   1 × exp  ( - Δ   H   2 × 38.681731 ) ≤ 4.367 × 10 - 4 when   μh   2 < μ   h   1 , and satisfy 3.984 × 10 - 9 ≤ exp  ( - Δ   H   2 × 38.681731 ) ≤ 4.367 × 10 - 4 when   μ   h   2 ≥ μ   h   1. ### Claim 8 (depends on 7) The organic EL element of claim 7, wherein Δ   H   2 , μ   h   2 ,  and   μ   h   1 satisfy 1.295 × 10 - 7 ≤ μ   h   2 μ   h   1 × exp  ( - Δ   H   2 × 38.681731 ) ≤ 3.406 × 10 - 7 when   μh   2 < μ   h   1 , and satisfy 1.295 × 10 - 7 ≤ exp  ( - Δ   H   2 × 38.681731 ) ≤ 3.406 × 10 - 7 when   μ   h   2 ≥ μ   h   1. ### Claim 9 (depends on 6) The organic EL element of claim 6, wherein Δ   H   1 , μ   h   3 ,  and   μ   h   2 satisfy 4.367 × 10 - 4 ≤ μ   h   3 μ   h   2 × exp  ( - Δ   H   1 × 38.681731 ) ≤ 2.090 × 10 - 2 when   μh   3 < μ   h   2 , and satisfy 4.367 × 10 - 4 ≤ exp  ( - Δ   H   1 × 38.681731 ) ≤ 2.090 × 10 - 2 when   μ   h   3 ≥ μ   h   2. ### Claim 10 (depends on 6) The organic EL element of claim 6, wherein Δ   E , μ   e   1 ,  and   μ   e   2 satisfy 4.367 × 10 - 4 ≤ μ   e   1 μ   e   2 × exp  ( - Δ   E × 38.681731 ) ≤ 2.090 × 10 - 2 when   μ   e   1 < μ   e   2 , and satisfy 4.367 × 10 - 4 ≤ exp  ( - Δ   E × 38.681731 ) ≤ 2.090 × 10 - 2 when   μ   e   1 ≥ μ   e   2. ### Claim 11 An organic electroluminescence (EL) element comprising: an anode; a hole transport layer above the anode, the hole transport layer containing a first organic semiconductor; a light-emitting layer on the hole transport layer, the light-emitting layer containing a second organic semiconductor; an electron transport layer on the light-emitting layer, the electron transport layer containing a third organic semiconductor; and a cathode above the electron transport layer, wherein the first organic semiconductor, the second organic semiconductor, and the third organic semiconductor each have a highest occupied molecular orbital (HOMO) and a lowest unoccupied molecular orbital (LUMO), electron mobility and hole mobility of the second organic semiconductor are similar, ΔE denoting a difference [eV] between a LUMO energy level of the first organic semiconductor and a LUMO energy level of the second organic semiconductor, μe1 denoting an electron mobility of the first organic semiconductor, and μe2 denoting an electron mobility of the second organic semiconductor satisfy μ   e   1 μ   e   2 × exp  ( - Δ   E × 38.681731 ) ≤ 2.090 × 10 - 2 when    μ   e   1 < μ   e   2 ,  and satisfy exp  ( - Δ   E × 38.681731 ) ≤ 2.090 × 10 - 2 when    μ   e   1 ≥ μ   e   2 , and ΔH denoting a difference [eV] between a HOMO energy level of the second organic semiconductor and a HOMO energy level of the third organic semiconductor, μh2 denoting a hole mobility of the second organic semiconductor, and μh3 denoting a hole mobility of the third organic semiconductor satisfy μ   h   3 μ   h   2 × exp  ( - Δ   H × 38.681731 ) ≤ 2.090 × 10 - 2 when    μ   h   3 < μ   h   2 ,  and satisfy exp  ( - Δ   H × 38.681731 ) ≤ 2.090 × 10 - 2 when    μ   h   3 ≥ μ   h   2. ### Claim 12 (depends on 11) The organic EL element of claim 11, wherein Δ   E , μ   e   1 ,  and   μ   e   2 satisfy 4.367 × 10 - 4 ≤ μ   e   1 μ   e   2 × exp  ( - Δ   E × 38.681731 ) ≤ 2.090 × 10 - 2 when   μ   e   1 < μ   e   2 , and satisfy 4.367 × 10 - 4 ≤ exp  ( - Δ   E × 38.681731 ) ≤ 2.090 × 10 - 2 when   μ   e   1 ≥ μ   e   2. ### Claim 13 (depends on 11) The organic EL element of claim 11, wherein Δ   H , μ   h   3 ,  and   μ   h   2 satisfy 4.367 × 10 - 4 ≤ μ   h   3 μ   h   2 × exp  ( - Δ   H × 38.681731 ) ≤ 2.090 × 10 - 2 when   μh   3 < μ   h   2 , and satisfy 4.367 × 10 - 4 ≤ exp  ( - Δ   H × 38.681731 ) ≤ 2.090 × 10 - 2 when   μ   h   3 ≥ μ   h   2.