Air-stable surface-passivated perovskite quantum dots (QDS), methods of making these QDS, and methods of using these QDS
Embodiments of the present disclosure provide for passivated quantum dots, methods of making passivated quantum dots, methods of using passivated quantum dots, and the like.
1. A composition comprising a passivated perovskite quantum dot, wherein the passivated perovskite quantum dot is of the form APbX 3 , where A is Cs + , Rb + , CH 3 NH 3 + , or HC(NH 2 ) 2 + , and X is a halogen, wherein the passivated perovskite quantum dot includes a capping ligand comprised of an inorganic-organic hybrid ion pair, wherein the inorganic-organic hybrid ion pair is a sulfur based inorganic-organic hybrid ion pair.
2. The composition of claim 1 , wherein the sulfur based inorganic-organic hybrid ion pair includes di-dodecyl dimethylammonium sulfide (S 2− -DDA + ).
3. The composition of claim 1 , where the passivated perovskite quantum dot is selected from the group consisting of: CsPbCl 3 , CsPbCl 3-x Br x where x is from 0 to 3, and CsPbBr 3 .
4. The composition of claim 1 , wherein the passivated perovskite quantum dot has the characteristic of being able to have an amplified spontaneous emission through one photon or two photons and wherein the passivated perovskite quantum dot has a photoluminescence quantum yield (PLQY) of about 50% or more.
5. A method of making passivated perovskite quantum dots, comprising:
mixing a solution of perovskite quantum dots with a sulfur precursor solution or a halide precursor solution; and
forming a passivated perovskite quantum dot having a capping ligand comprised of inorganic-organic hybrid ion pairs;
wherein the sulfur precursor solution and the halide precursor solution include ions for forming inorganic-organic hybrid ion pairs and wherein the perovskite quantum dots are of the form APbX 3 , where A is Cs + , Rb + , CH 3 NH 3 + , or HC(NH 2 ) 2 + , and X is a halogen.
6. The method of claim 5 , wherein the inorganic-organic hybrid ion pair is a sulfur based inorganic-organic hybrid ion pair.
7. The method of claim 5 , wherein sulfur precursor solution includes di-dodecyl dimethylammonium sulfide (S 2− -DDA + ).
8. The method of claim 5 , wherein halide precursor solution is selected from the group consisting of: di-dodecyl dimethylammonium bromide (BR − -DDA + ), di-dodecyl dimethylammonium chloride (Cl − -DDA + ), and a combination thereof.
9. The composition of claim 1 , wherein a diameter of the passivated perovskite quantum dot ranges from about 75 nm to about 160 nm.
10. The composition of claim 1 , wherein a diameter of the quantum dot ranges from about 5 nm to about 20 nm.
11. The composition of claim 1 , wherein a thickness of the capping ligand ranges from about 70 nm to about 140 nm.
12. The composition of claim 1 , wherein the passivated perovskite quantum dot has a photoluminescence quantum yield (PLQY) of about 70% or more.
13. A composition comprising a passivated perovskite quantum dot, wherein the passivated perovskite quantum dot is of the form APbX 3 , where A is Cs + , Rb + , CH 3 NH 3 + , or HC(NH 2 ) 2 + , and X is a halogen, wherein the passivated perovskite quantum dot includes a capping ligand comprised of an inorganic-organic hybrid ion pair, wherein the inorganic-organic hybrid ion pair includes di-dodecyl dimethylammonium (DDA + ) and an anion.
14. The composition of claim 13 , wherein the anion of the inorganic-organic hybrid ion includes one or more of Cl − , Br − , I − , S 2− , SH − , Se 2− , HSe − , Te 2− , HTe − , TeS 3 2− , and AsS 3 2− .
15. The composition of claim 13 , wherein the inorganic-organic hybrid ion pair includes one or more of di-dodecyl dimethylammonium sulfide (S 2− -DDA + ), di-dodecyl dimethylammonium bromide (Br − -DDA + ), di-dodecyl dimethylammonium chloride (Cl − -DDA + ).
16. The composition of claim 13 , where the passivated perovskite quantum dot is selected from the group consisting of: CsPbCl 3 , CsPbCl 3-x Br x where x is from 0 to 3, and CsPbBr 3 .
17. The composition of claim 13 , wherein the passivated perovskite quantum dot has the characteristic of being able to have an amplified spontaneous emission through one photon or two photons and wherein the passivated perovskite quantum dot has a photoluminescence quantum yield (PLQY) of about 50% or more.
18. The composition of claim 13 , wherein a diameter of the passivated perovskite quantum dot ranges from about 75 nm to about 160 nm and/or wherein a diameter of the quantum dot ranges from about 5 nm to about 20 nm.
19. The composition of claim 13 , wherein a thickness of the capping ligand ranges from about 70 nm to about 140 nm.