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A tin-doped methylammonium lead iodide perovskite solar cell

A technology of solar cells and methyl ammonium, applied in the field of solar cells, can solve problems such as cumbersome production process, high production cost, and resource consumption, and achieve the effects of promoting flatness, low cost, and increasing current intensity

Active Publication Date: 2018-10-23
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although a higher photoelectric conversion efficiency was obtained by using the two-step method, the experimental production process is too cumbersome, which not only wastes a lot of time but also consumes a lot of resources, resulting in high production costs and is not environmentally friendly.

Method used

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  • A tin-doped methylammonium lead iodide perovskite solar cell
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  • A tin-doped methylammonium lead iodide perovskite solar cell

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Embodiment Construction

[0017] Such as figure 1 As shown, the tin-doped methylammonium lead iodide perovskite solar cell has a planar heterojunction structure: the structure of the solar cell in this embodiment is: ITO / PEDOT:PSS / CH 3 NH 3 sn x Pb 1-x I 3 / PC 60 BM / Al.

[0018] In the battery structure, the thickness of the ITO anode is 100 nm, and the sheet resistance is 10Ω.

[0019] In the battery structure, the thickness of the hole transport layer PEDOT:PSS is 30 nm, which is formed by solution spin coating and then annealed in air. The spin coating rate is 3000 rpm, the spin coating time is 30 s, the annealing temperature is 120 °C, and the annealing time is 10 minutes,

[0020] In the battery structure, the active layer is CH 3 NH 3 sn 0.25 Pb 0.75 I 3 Perovskite thin films prepared from methylamine iodide (CH 3 NH 3 I), lead iodide (PbI 2 ) and tin iodide (SnI 2 ) was dissolved in a mixed solvent of N,N-dimethylformamide (DMF) and dimethyl sulfoxide (DMSO) according to the mola...

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Abstract

The invention relates to the field of solar cells, in particular to an organic-inorganic hybrid perovskite solar cell. A tin-doped methylammonium lead iodide perovskite solar cell, the active layer is a tin-doped methylammonium lead iodide perovskite CH3NH3SnxPb1‑xI3 thin film, and the present invention tin-doped methylammonium iodide The lead perovskite solar cell has a planar heterojunction structure. The present invention proposes a method for preparing a CH3NH3SnxPb1‑xI3 perovskite solar cell using a multi-step solvent treatment-assisted one-step method, and obtains a high-quality perovskite film. A high photoelectric conversion efficiency is realized.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to an organic-inorganic hybrid perovskite solar cell. Background technique [0002] The light absorption layer of perovskite solar cells is an organic-inorganic hybrid perovskite material with the chemical formula AMX 3 (A:CH 3 NH 3+ ; M: IVA group Pb, Sn mixed elements; X: halogen elements), unit cell structure MX 6 Form octahedra and contact each other to form a three-dimensional structure, NH 3 CH 3+ embedded in it. The development of perovskite solar cells is of great significance to the large-scale use of solar energy to provide cheap electricity. At present, the biggest problem of tin-doped methylammonium lead iodide perovskite solar cells is low photoelectric conversion efficiency and poor stability, which cannot meet the needs of commercial applications. A key solution to improve the photoelectric conversion efficiency of this type of cell is to improve the film quality of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/48
CPCH10K71/15H10K71/12H10K71/40H10K30/10Y02E10/549
Inventor 郝玉英李林钢房晓红张帆张青兰孙钦军李战峰崔艳霞
Owner TAIYUAN UNIV OF TECH