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Perovskite solar cells based on nano-onion carbon:PC61BM composite electron transport layer

A PC61BM, solar cell technology, applied in circuits, electrical components, photovoltaic power generation, etc., can solve the problems of slow carrier transmission, hysteresis, poor stability, etc., to avoid the decomposition of perovskite structure, increase the number, improve the The effect of fill factor

Active Publication Date: 2019-05-28
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Based on the above technical problems, the invention provides a carbon based on nano onion: PC 61 The perovskite solar cell with BM composite electron transport layer, thus solving the technical problems of slow carrier transport speed, performance hysteresis and poor stability of perovskite solar cells in the past

Method used

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  • Perovskite solar cells based on nano-onion carbon:PC61BM composite electron transport layer
  • Perovskite solar cells based on nano-onion carbon:PC61BM composite electron transport layer
  • Perovskite solar cells based on nano-onion carbon:PC61BM composite electron transport layer

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Embodiment

[0030] Such as figure 1 As shown, a nano-onion based carbon: PC 61 A perovskite solar cell with a BM composite electron transport layer, the solar cell adopts a positive structure, including a substrate layer 1, an ITO transparent conductive anode layer 2 (ITO, English name Indium Tin Oxides, that is, indium oxide) arranged in sequence from bottom to top Tin), hole transport layer 3, perovskite photoactive layer 4, composite electron transport layer 5 and metal cathode layer 6;

[0031] in,

[0032] Composite electron transport layer 5 is PC 61 Solid composite layer structure composed of BM material and nano-onion carbon material mixed in proportion;

[0033] Nano-onion carbon materials and PC in composite layer structure 61 The mass percentages of BM materials are:

[0034] Nano-onion carbon 1% to 10%;

[0035] PC 61 BM99%~90%.

[0036] In the above embodiments, the thickness of the ITO transparent conductive anode layer 2 ranges from 20 to 40 nm.

[0037] Preferably...

specific Embodiment

[0045] Control group 1

[0046] Clean the substrate composed of the substrate layer 1 and the ITO transparent conductive anode layer 2 with a surface roughness less than 1nm, and dry it with nitrogen after cleaning; spin-coat the PEDOT:PSS solution on the surface of the ITO transparent conductive anode layer 2 (operating parameters : rotation speed 3000rpm, time 40s) to prepare the hole transport layer 3; and bake the formed film (working parameters: temperature 135°C, time 30min); spin coating on the ITO transparent conductive anode layer 2 to prepare the perovskite light Active layer 4 (thickness 250nm); Spin coating on the surface of perovskite photoactive layer 4 to prepare nano-onion carbon to prepare composite electron transport layer 5 (thickness 20nm; vapor-deposit metal cathode Ag (thickness 100nm, constituting calcium) on metal cathode layer 6 Titanium solar cell devices.

[0047] Under standard test conditions: air quality AM 1.5, light intensity 100mW / cm 2 , the ...

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Abstract

The invention relates to a perovskite solar cell based on a nano-onion carbon: PC61BM composite electron transport layer. The solar cell adopts a positive structure, including a substrate layer, an ITO transparent conductive anode layer, and a hole transport layer arranged sequentially from bottom to top. layer, perovskite photoactive layer, composite electron transport layer and metal cathode layer; the composite electron transport layer is a solid composite layer structure composed of PC61BM material and nano-onion carbon material mixed in proportion; nano-onion carbon material and PC61BM in the composite layer structure The mass percentages of the materials are: 1%-10% of nano-onion carbon; 99%-90% of PC61BM. The invention effectively reduces the series resistance of the device, reduces the recombination probability of electrons at the electron transport layer / photoactive layer interface, and improves the filling factor of the device; at the same time, it increases the number of electrons transported to the cathode and improves the carrier transport rate.

Description

technical field [0001] The invention relates to a solar cell, which belongs to the field of new energy solar cells; in particular, it relates to a nano-onion carbon: PC 61 Perovskite solar cells with BM composite electron transport layer. Background technique [0002] With the global energy demand increasing year by year, the effective use of renewable energy has become an urgent problem to be solved. At present, most of the energy used in the world comes from the extraction of fossil fuels, including oil, natural gas and coal. However, these resources are limited. Solar energy, which accounts for more than 99% of the earth's total energy, is inexhaustible, inexhaustible, and non-polluting, so it has become one of the new energy sources developed and utilized by scientists from all over the world. Perovskite (perovskite) is a German mineralogist Gustav Rose (Gustav Rose) found perovskite rock samples on the Ural Mountains in central Russia in 1839, and decided to use his ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/44H01L51/46
CPCY02E10/549
Inventor 于军胜郑丁范谱侯思辉
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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