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A low-dimensional perovskite solar cell based on linear organic diamine and its preparation method and application

A solar cell and perovskite technology, applied in circuits, electrical components, electrical solid devices, etc., can solve problems such as low photoelectric conversion efficiency and limited charge transmission, and achieve high stability, simple steps, and high efficiency.

Active Publication Date: 2020-03-27
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at the same time, the organic amine molecules form an insulating layer in the middle of the inorganic layer, which limits the charge transport and leads to low photoelectric conversion efficiency.

Method used

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  • A low-dimensional perovskite solar cell based on linear organic diamine and its preparation method and application
  • A low-dimensional perovskite solar cell based on linear organic diamine and its preparation method and application
  • A low-dimensional perovskite solar cell based on linear organic diamine and its preparation method and application

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Embodiment

[0041] This example is the preparation of low-dimensional perovskite solar cells based on different carbon chain organic diamines of the present invention, so as to fully understand the present invention. It mainly includes the following steps:

[0042] Step 1) Take 90ml of methylamine and place it in an ice-water bath in a round-bottomed flask, and slowly add 27.6ml of glacial acetic acid dropwise therein. After 2 hours in the ice-water bath, spin-evaporate at 55°C until there is no droplet, and prepare methylamine acetate for use.

[0043] Step 2) Take a certain amount of different carbon chain organic diamines and place them in an ice-water bath in a round-bottomed flask, add HI to it at a molar ratio of 1:2.1, and after 2 hours in an ice-water bath, spin-evaporate at 55°C until there are no droplets dropwise, washed with diethyl ether and rotary evaporated the solid, dried under vacuum at 60°C to obtain (NH 3 (CH 2 ) X NH 3 ) I 2 (x=2-6) Solid.

[0044] Step 3) Clean...

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Abstract

The invention relates to a low-dimensional perovskite solar cell based on straight-chain organic diamine and its preparation method and application, belonging to the field of optoelectronic materials and devices. In this invention, different carbon chain organic diamines are dissolved in methylamine acetate solution with chloromethylamine and lead iodide according to different stoichiometric ratios, and prepared into a perovskite precursor solution, which is then spun by a heating spin coating method. It is coated on the ITO substrate that has been deposited with PEDOT:PSS, and after annealing, a dense, uniform and highly stable perovskite film is formed. The whole process is completely operated in the air. Then spin-coat the PCBM electron transport layer on the film, and then use the vacuum evaporation technology to evaporate the modified layer LiF and the metal Al electrode to complete the preparation of the device.

Description

technical field [0001] The invention relates to a low-dimensional perovskite solar cell based on a straight-chain organic diamine and a preparation method thereof, in particular to a low-dimensional perovskite solar cell that can achieve high efficiency and high stability by using an organic diamine, and belongs to Optoelectronic materials and technology field. Background technique [0002] Facing the current energy shortage problem, using the photovoltaic effect to convert solar energy into electrical energy has become one of the important methods to meet energy demand. In recent years, perovskite solar cells have attracted people's attention due to their low cost, simple preparation process, and high photoelectric conversion efficiency. In just a few years, their photoelectric conversion efficiency has reached 22.7%. However, due to its instability to water, oxygen, light, high temperature, etc., the practical application of perovskite solar cells is greatly limited. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/56H01L51/50
CPCH10K50/15H10K71/00
Inventor 陈永华牛婷婷夏英东黄维
Owner NANJING TECH UNIV