Wide bandgap perovskite quantum dots in a perovskite matrix and process for preparing same
AssigneesHuawei Technologies Canada Co., Ltd., The Governing Council of the University of Toronto
InventorsYuan Liu, Giovanni Francesco Cotella, Quan Lyu, Peter Chun, Ziliang Li, Yitong Dong, Edward Sargent
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Abstract
The present invention provides quantum dot (QD)-in-matrix materials for use in blue light emitting diodes, wherein the QD-in-matrix material comprises a plurality of quantum dots embedded in a doped lead perovskite matrix.
Claims12
A quantum dot (QD)-in-matrix material for use in blue light emitting diodes, wherein the QD-in-matrix material comprises a plurality of quantum dots embedded in a perovskite matrix,
- wherein the quantum dots comprise a perovskite having Formula (I):
- ABX3 (I)
- wherein
- A is Cs, MA (methylammonium), FA (formamidinium), or any combination thereof;
- B is Pb, Sn, or a combination thereof;
- and
- X is Br, Cl, or a combination thereof;
- and
- wherein the perovskite matrix is a doped perovskite having Formula (II):
- A′B′1-xDxX′3 (II)
- wherein
- A′ is Cs, MA, FA, or any combination thereof;
- B′ is Pb, Sn, or a combination thereof;
- X′ is Br;
- D is Sr, Ca, Ba, Eu, Zn, Cd, Hf, Ti, Se, Zr, or Mn;
- and
- x is a value between 0.05 and 0.5,
- wherein the material further comprises an organic passivant,
- wherein the organic passivant is bis(4-fluorophenyl)phenyl phosphine oxide (DFPPO).
A quantum dot (QD)-in-matrix material for use in blue light emitting diodes, wherein the QD-in-matrix material comprises a plurality of quantum dots embedded in a perovskite matrix,
- wherein the quantum dots comprise a perovskite having Formula (I):
- ABX3 (I)
- wherein A is Cs, B is Pb, and X is Br;
- and
- wherein the perovskite matrix is a doped perovskite having Formula (II):
- A′B′1-xDxX′3 (II)
- wherein
- A′ is Cs, MA, FA, or any combination thereof;
- B′ is Pb;
- X′ is Br;
- D is Sr;
- and
- x is 0.4;
- and
- wherein the material further comprises an organic passivant.
A quantum dot (QD)-in-matrix material for use in blue light emitting diodes, wherein the QD-in-matrix material comprises a plurality of quantum dots embedded in a perovskite matrix,
- wherein the quantum dots comprise a perovskite having Formula (I):
- ABX3 (I)
- wherein A is Cs, B is Pb, and X is Br;
- and
- wherein the perovskite matrix is a doped perovskite having Formula (II):
- A′B′1-xDxX′3 (II)
- A′ is Cs0.8MA0.2;
- B′ is Pb;
- X′ is Br;
- D is Sr;
- and
- x is 0.4;
- and
- wherein the material further comprises an organic passivant.
Dependencies are inferred from the claim text.