公开(公告)号：US20240006857A1

公开(公告)日：2024-01-04

申请号：US18344987

申请日：2023-06-30

Applicant: ZHEJIANG UNIVERSITY

Inventor： Dawei DI ,  Xuhui CAO ,  Shiyu XING ,  Yaxiao LIAN

IPC: H01S5/36 ,  H01S5/14

CPC classification number: H01S5/36 ,  H01S5/14 ,  H01S2304/04

Abstract: Disclosed are an external-cavity-free low-threshold perovskite laser device and an application thereof. A gain medium is a perovskite material or a combination of the perovskite material and other materials. An ingredient of the perovskite is A′2An−1BnX3n+1, or ABX3, A′ is an organic amine cation, A is a monovalent cation, B is a metal cation, and X is an anion; and a preparation method of the gain medium comprises dissolving A′ X, AX and BX in a solvent to obtain a precursor solution of perovskite or a nanocrystalline, and the gain medium is prepared by a solution method. Or, the A′ X, the AX and the BX are prepared by non-solution methods such as evaporation, vapor deposition, magnetron sputtering and solid-state reaction. According to the laser device in the invention, a resonant cavity does not need to be additionally designed and machined, so that compactness and integration of the device are improved.

公开(公告)号：US20240090317A1

公开(公告)日：2024-03-14

申请号：US18499841

申请日：2023-11-01

Applicant: ZHEJIANG UNIVERSITY

Inventor： Dawei DI ,  Bingbing GUO ,  Yaxiao LIAN ,  Baodan ZHAO

IPC: H10K85/50

CPC classification number: H10K85/50

Abstract: Provided are a perovskite material with stable bipolar molecules and a photoelectric device. The invention aims to provide the perovskite material with the stable bipolar molecules and the photoelectric device, which can indirectly enhance an interaction between metal cations and halogen anions, reduce a defect state density in the perovskite material, and inhibit ion migration in the perovskite material by utilizing bipolar groups in a bipolar molecule stabilizer. A component of the perovskite material with the stable bipolar molecules is D: A′2An−1BnX3n+1 or D: ABX3, wherein A′ is an organic amine cation, A is a monovalent cation, B is a metal cation, X is a monovalent anion, and D is the bipolar molecule stabilizer. A thermal stability, a phase stability and a photoluminescence stability of the material are remarkably enhanced, and working stabilities and efficiencies of the perovskite material and the photoelectric device are remarkably improved.

公开(公告)号：US20210365607A1

公开(公告)日：2021-11-25

申请号：US17322932

申请日：2021-05-18

Applicant: Zhejiang University

Inventor： Dawei DI ,  Yaxiao LIAN ,  Qian ZHOU ,  Baodan ZHAO

IPC: G06F30/20

Abstract: A photon confinement theoretical model is proposed, and a solar cell structure model is designed based on the theoretical model, thereby providing a photonically-confined solar cell and optoelectronic device to effectively reduce the probability of photons escaping from the cell. The theoretical model is established by the following steps: obtaining a relationship between a photocurrent density and an incident photon energy; obtaining a relationship between a radiative recombination photocurrent density and the incident photon energy; determining a relationship between the radiative recombination photocurrent density and a total recombination photocurrent density; obtaining a relationship between the photocurrent density generated by the standard spectral irradiance, the total recombination photocurrent density and an external current density of the solar cell; obtaining an output open-circuit voltage of the cell; obtaining an output short-circuit current density of the cell; obtaining a fill factor (FF); and obtaining a maximum power conversion efficiency (PCE).