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A kind of trans planar structure perovskite solar cell and its preparation method
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A technology of solar cells and planar structures, applied in circuits, electrical components, photovoltaic power generation, etc., can solve the problems of insufficient coating of perovskite films, high surface roughness of nickel oxide, and poor conductivity, etc., and achieve dense films, Effect of smooth surface and increased transmittance
Active Publication Date: 2022-03-11
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology
However, there are two main problems in NiOx-based organic-inorganic hybrid perovskite solar cells at present. First, the existence of nickel oxide surface defects and poor transmittance make the conductivity worse; second, the open circuit voltage of NiOx-based devices ( Voc) is relatively low, which is due to the high surface roughness of nickel oxide and the existence of a large number of pinholes, which makes the coating of the perovskite film on its surface unsatisfactory, which causes the interfacial recombination caused by the release of the electron transport layer.
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Embodiment 1
[0034] The trans planar structure perovskite solar cells were fabricated according to the following steps:
[0035] Step 1: Put the 2cm×2cm FTO conductive glass into the cleaning rack, use detergent, deionized water, acetone, isopropanone and absolute ethanol to clean it ultrasonically, and then blow it dry with nitrogen.
[0036] Dissolve 0.1g of nickel acetate in 4mL of ethanol solution, add 24uL of ethanolamine, and stir in a water bath at 60°C for 6-10h. After filtering, a nickel oxide precursor solution is obtained. Next, 50 ul of tributyl phosphate tBP solution was added to 4 mL of nickel oxide solution to obtain a hole transport layer precursor solution. The hole transport layer precursor solution was spin-coated on the pretreated FTO glass surface. Spin coating at a speed of 4000 rpm for 40 s, and then anneal at 280° C. for 60 min to obtain a nickel oxide hole transport layer.
[0037] Step 2: Dissolve 2 mg of LiF in 1 mL of deionized water, and stir for 12-36 hours...
Embodiment 2
[0043] The trans planar structure perovskite solar cells were fabricated according to the following steps:
[0044] Step 2 is not included in this embodiment, and other steps are the same as the preparation method of the embodiment.
Embodiment 3
[0046] The trans planar structure perovskite solar cells were fabricated according to the following steps:
[0047] Step 2, step 3, step 4, step 5, step 6 preparation process is identical with embodiment.
[0048] Step 1: Put the 2cm×2cm FTO conductive glass into the cleaning rack, use detergent, deionized water, acetone, isopropanone and absolute ethanol to clean it ultrasonically, and then blow it dry with nitrogen.
[0049] Dissolve 0.1g of nickel acetate in 4mL of ethanol solution, add 24uL of ethanolamine, and stir in a water bath at 60°C for 6-10h. After filtering, a nickel oxide precursor solution is obtained. The nickel oxide precursor solution was spin-coated on the pretreated FTO glass surface. Spin coating at a speed of 4000 rpm for 40 s, and then anneal at 280° C. for 60 min to obtain a nickel oxide hole transport layer.
[0050] The surface morphology and surface roughness of the obtained perovskite light-absorbing layer films were observed by scanning electron...
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Abstract
The invention discloses a perovskite solar cell with a reverse planar structure and a preparation method thereof, comprising a conductive substrate, a hole transport layer, an ultra-thin modification layer, a perovskite light-absorbing layer, and an electron transport layer which are sequentially stacked from bottom to top , an interface modification layer and a metal cathode; the hole transport layer is prepared by doping nickel oxide with tributyl phosphate, and the ultra-thin modification layer is LiF with a thickness of 1 to 5 nm; the invention improves the transmittance of nickel oxide, improves conductivity, Inhibit the interfacial recombination between the hole transport layer and the perovskite light-absorbing layer, improve the transport efficiency of carriers between the interfaces, improve the crystal quality of the perovskite film, reduce the defects of the perovskite photoactive layer, and improve the perovskite Mining solar cell device performance.
Description
technical field [0001] The invention relates to the technical field of perovskite solar cells, in particular to a trans planar structure perovskite solar cell and a preparation method. Background technique [0002] In the 21st century, the demand for energy in the economy and society is increasing, and traditional energy is increasingly unable to meet the needs of social development due to its own limitations. As a renewable energy source, solar energy has the advantages of being inexhaustible, economical and environmentally friendly. It is an important trend in the development of new energy technology to develop solar energy, especially cheap solar cell technology, and promote solar cell parity power generation. [0003] In recent years, perovskite solar cells have been rapidly pushed up to the level of traditional crystalline silicon solar cells due to their low material cost, simple preparation process, and cell efficiency. Special attention from the industry. Metal hal...
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