A perovskite solar cell with energy band gradient based on mixed steaming process and its preparation method

A technology of solar cells and perovskites, applied in the field of solar cells, to achieve the effects of high film quality, novel and unique structure, and uniform film layers

Active Publication Date: 2020-09-04
四川恒立聚能光电科技有限公司
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is: in order to solve the problem that the existing functional layer is prepared by the spin coating process, but the spin coating area is larger and the thickness of the film layer is more difficult to control in the spin coating process. The perovskite solar cell with energy band gradient and its preparation method according to the technology, adopts the blending evaporation process to horizontally arrange the perovskite layers with different energy band widths side by side to obtain the perovskite solar cell with energy band gradient, It can not only overcome the interface problem between functional layers, but also control the thickness of the film, so that the performance of the device can be improved

Method used

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  • A perovskite solar cell with energy band gradient based on mixed steaming process and its preparation method
  • A perovskite solar cell with energy band gradient based on mixed steaming process and its preparation method
  • A perovskite solar cell with energy band gradient based on mixed steaming process and its preparation method

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Embodiment 1

[0060] Such as figure 1 As shown, this embodiment provides a perovskite solar cell with an energy band gradient based on a mixed steaming process, including a light reflection layer 1, a transparent conductive electrode layer 3, a hole transport layer 4, The perovskite light-absorbing layer 5, the electron transport layer 6 and the metal electrode layer 7, the perovskite light-absorbing layer 5 includes several perovskite polycrystalline films with different energy band widths prepared by a blending evaporation process, and the several calcium Titanium polycrystalline films are arranged side by side horizontally;

[0061] The material of the light reflection layer 1 is metallic silver with a thickness of 100nm; the material of the transparent conductive electrode layer 3 is nano-indium tin metal oxide ITO with a thickness of 150nm; the material of the hole transport layer 4 is PEDOT:PSS thin film with a thickness of 90nm ; The perovskite light-absorbing layer 5 includes CH wi...

Embodiment 2

[0075] The preparation method is basically the same as that of Example 1, except that the evaporation of the perovskite light-absorbing layer 5 is: when the substrate C is vacuum-evaporated using the mask plate B, the evaporation rate ratio of methylamine lead iodine to methylamine lead bromine is set to 0.7:0.3, the evaporation temperature is also controlled at 250°C; then when using the mask plate C to vacuum evaporate the base D, the evaporation rate ratio of methylamine lead iodide to methylamine lead bromide is set to 0.6:0.4, and the evaporation temperature is also controlled at 250°C.

[0076] At room temperature, use a xenon lamp to simulate sunlight, and the light intensity is AM1.5 (100mW / cm 2 ), the light beam is also obliquely incident on the solar cell device, and the test results show that the reverse-scan photoelectric conversion efficiency of the perovskite solar cell with energy band gradient is 13.1%, and the forward-scan photoelectric conversion efficiency i...

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Abstract

The invention discloses a perovskite solar cell with an energy band gradient based on a mixed steaming process and a preparation method thereof, and relates to the technical field of solar cells. The perovskite solar cell of the present invention includes light reflectors arranged sequentially from bottom to top Layer, transparent conductive electrode layer, hole transport layer, perovskite light-absorbing layer, electron transport layer and metal electrode layer, the perovskite light-absorbing layer includes several perovskites with different energy band widths prepared by the blend evaporation process Polycrystalline film, several perovskite polycrystalline films are arranged horizontally side by side. The preparation method of the present invention adopts a blending evaporation process to arrange perovskite layers with different energy band widths horizontally to obtain perovskite with energy band gradient Solar cells can not only overcome the interface problem between functional layers, but also improve the open circuit voltage of the device to a certain extent, so that the performance of the device can be improved.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a perovskite solar cell with energy band gradient based on a mixed steaming process and a preparation method thereof. Background technique [0002] In recent years, the energy crisis and environmental pollution have become the focus of global attention. As the third generation of solar cells, the emergence of perovskite solar cells has attracted widespread attention from academia and industry due to its superior material properties. Since the perovskite solar cell was first prepared by Professor Miyasaka and his research group in 2009, its energy conversion efficiency has increased from the initial 3.8% (Journal of the American Chemical Society, 2009, 131(17): 6050-6051.) It has been improved to 22.1% (NREL) today, which is comparable to the performance of traditional silicon-based solar cells, and is constantly approaching the level of commercialization. Compared with tradi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/44H01L51/48
CPCH10K71/164H10K30/15H10K30/87Y02E10/549
Inventor 黄江向思衡王子君何磊
Owner 四川恒立聚能光电科技有限公司
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