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Perovskite solar battery and preparation method thereof

A solar cell and perovskite technology, applied in the field of solar cells, achieves the effects of good repeatability, high efficiency, and a simple and convenient method

Active Publication Date: 2017-02-22
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Niobium pentoxide (niobium oxide for short) is a typical N-type semiconductor material, which has similar optical bandgap, energy level position and charge transport characteristics as titanium oxide, as well as excellent chemical stability, but it is used as Materials for the electron transport layer of perovskite solar cells have not been reported

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  • Perovskite solar battery and preparation method thereof
  • Perovskite solar battery and preparation method thereof
  • Perovskite solar battery and preparation method thereof

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Embodiment 1

[0023] See attached figure 1 , which is a structural schematic diagram of a perovskite solar cell provided by the present invention, which includes a rigid glass substrate, a cathode 1, an electron transport layer 2, a perovskite light-absorbing layer 3, a hole transport layer 4 and an anode 5, the device The preparation method comprises the steps:

[0024] Step 1, cleaning the cathode 1 composed of the glass substrate and the transparent electrode with acetone, detergent, isopropanol and acetone respectively. After the substrate was treated with ultraviolet ozone for 20 minutes, at room temperature, a niobium oxide film was prepared by magnetron sputtering to form an electron transport layer 2 for transporting electrons: RF sputtering, the power was 150 watts, and the distance between the target and the sample was 15 cm to form a 150 nm niobium oxide electron transport layer 2 . The work function of the niobium oxide thin film measured by ultraviolet photoelectron spectrosc...

Embodiment 2

[0029] This embodiment provides a kind of perovskite solar cell, its structure is as follows figure 1 As shown, the specific preparation steps are as follows:

[0030] Step 1, cleaning the cathode 1 composed of the glass substrate and the transparent electrode with acetone, detergent, isopropanol and acetone respectively. After applying ultraviolet ozone to the substrate for 20 minutes, magnetron sputtering was used at room temperature to prepare a niobium oxide film to form an electron transport layer for transporting electrons 2: radio frequency sputtering, the power is 100 watts, and the distance between the target and the sample is 15 cm, forming 100 nm niobium oxide electron transport layer 2 .

[0031] Step 2, anneal the prepared niobium oxide electron transport layer 2 in air at 500°C for 45 minutes to obtain hexagonal niobium oxide, and use ultraviolet ozone for 10 minutes to prepare perovskite light-absorbing layer 3 on the electron transport layer 2 by spin coating ...

Embodiment 3

[0035] This embodiment provides a figure 1 The preparation method of the shown perovskite solar cell uses a flexible substrate, and the specific steps are as follows:

[0036] In step 1, the cathode 1 composed of polyethylene terephthalate (PET) and the transparent electrode is cleaned with acetone, detergent, isopropanol and acetone respectively. After the substrate was treated with ultraviolet ozone for 20 minutes, a niobium oxide film was prepared by magnetron sputtering at room temperature to form an electron transport layer for transporting electrons 2: RF sputtering, the power is 50 watts, and the distance between the target and the sample is 15 cm , forming a 50 nm niobium oxide electron transport layer 2 .

[0037] Step 2, the substrate is treated with ultraviolet ozone for 10 minutes, and the perovskite light-absorbing layer 3 is prepared by spin coating on the electron transport layer 2. The specific method is to use lead iodide and methylamino iodide in a molar rat...

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Abstract

The invention discloses a perovskite solar battery and a preparation method thereof. The preparation method comprises the following steps: on a cathode substrate, preparing a niobium oxide film through radio frequency magnetron sputtering at room temperature so as to form an electron transmission layer for transmitting electrons; preparing a perovskite light absorption layer on the electron transmission layer, and furthermore sequentially preparing a hole transmission layer for transmitting holes and an anode for collecting the holes to obtain the perovskite solar battery. The preparation method for preparing a niobium oxide electron transmission layer under the room temperature condition has the characteristics of being simple and controllable in process, and good in uniformity and repeatability of the prepared niobium oxide film, and large-scale production can be achieved; meanwhile, as the electron transmission layer, the niobium oxide film prepared by using a radio frequency magnetron sputtering method under the room temperature condition does not need high-temperature calcinations, so that the whole production process of the perovskite solar battery can be implemented at low temperature (less than or equal to 100 DEG C), and is particularly applicable to a flexible substrate.

Description

technical field [0001] The invention relates to a perovskite solar cell and a preparation method thereof, in particular to a method for preparing an electron transport layer at a low temperature, and belongs to the technical field of solar cells. Background technique [0002] Perovskite solar cells have attracted much attention in the past few years due to their excellent light absorption ability, low exciton binding energy and long carrier diffusion length. quickly climbed to 22.1%. In addition, perovskite solar cells have the characteristics of relatively simple cell structure, simple solution method preparation process, and low cost, and have gradually become a very competitive solar cell. [0003] Perovskite solar cells generally adopt a sandwich structure, and the perovskite light-absorbing layer is placed between the electron-transporting layer and the hole-transporting layer. Among them, small molecules or polymers are often used as hole transport materials for batt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/44H01L51/48
CPCH10K71/00H10K71/40H10K30/00H10K30/87Y02E10/549Y02P70/50
Inventor 马万里凌旭峰袁建宇
Owner SUZHOU UNIV
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