A method to suppress dark current in perovskite detectors
A perovskite and detector technology, applied in the field of suppressing the dark current of perovskite detectors, can solve the problems of high dark current and low sensitivity, and achieve the effects of improving sensitivity, reducing detection limit, and suppressing dark current.
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Embodiment example 1
[0028] This example will introduce that the molar ratio of doped atoms is 10 -5 Bi 3+ Enter MAPbBr 3 Preparation of single crystals.
[0029] Take (0.089g) bismuth bromide (BiBr 3 ) powder, add the powder to 10ml organic solvent DMF, dilute the resulting solution once, dilute 10 times, take 35uL diluted solution and add 10ml of 0.7Mol / L MAPbBr 3 In the precursor solution, the solution is stored in a polytetrafluoroethylene beaker, covered with tin foil, poked three small holes with the needle tip of the syringe, placed on a hot stage at 70 degrees, and evaporated to crystallize the solvent. After about 12 hours, take out the growth For a single crystal, use thermal evaporation to vaporize a 100nm thick gold electrode on the upper and lower surfaces of the single crystal.
[0030] In this embodiment, the molar ratio of doped atoms is 10 -5 BiBr 3 Enter MAPbBr 3 Precursor solution, single crystal growth by solvent evaporation method, and preparation of detectors (such as ...
Embodiment example 2
[0032] This example will introduce that the molar ratio of doped atoms is 10 -9 Sb 3+ Enter MAPbI 3 Preparation of single crystals.
[0033] Take (0.072g) antimony bromide (SbBr 3 ) powder, the powder was added to 10ml organic solvent DMF, and the resulting solution was diluted three times, the first two dilutions were 100 times each time, and the last dilution was 10 times. Take 50uL of the diluted solution and add 10ml of 1Mol / L MAPbI 3 In the precursor solution, the solution was stored in a polytetrafluoroethylene beaker, covered with tin foil, put into a beaker with 10ml of hexane, and crystallized with an anti-solvent. After about 12 hours, the single crystal grown in it was taken out, and heated Evaporate 100nm thick gold electrodes on the upper and lower surfaces of the single crystal.
[0034] In this embodiment, the molar ratio of doped atoms is 10 -9 SbBr 3 Enter MAPbI 3 Precursor solution, grow single crystal by anti-solvent method, and prepare detector.
Embodiment example 3
[0036] This example will introduce that the molar ratio of doped atoms is 10 -10 Bi 3+ Enter CsPbBr 3 Preparation of single crystals.
[0037] Take (0.089g) bismuth bromide (BiBr 3 ) powder, add the powder into 10ml organic solvent DMSO, dilute the obtained solution four times, the first three dilutions are 100 times each time, and the last dilution is 10 times, take 90uL of the diluted solution and add 1.5ml of 1.2Mol / L CbBr 3 In the precursor solution, the solution is packed in a small bottle, put it into a 60-degree oil bath, raise the temperature to 100 degrees at a rate of 5 degrees Celsius per minute, keep it warm for 3 hours, and then raise the temperature to 120 degrees at a rate of 5 degrees Celsius per minute, and take it out The single crystal was rinsed with hot DMSO, dried in a vacuum at 100°C for 1 hour, and a 100nm-thick gold electrode was evaporated on the upper and lower surfaces of the single crystal by thermal evaporation.
[0038] In this embodiment, b...
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