Perovskite solar cell and preparation method for same

A solar cell and perovskite technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as incomplete matching of Fermi levels, photocurrent hysteresis, and use restrictions, and achieve optimized interface contact characteristics and easy operation , the effect of improving performance

Inactive Publication Date: 2017-05-31
KUSN INNOVATION INST OF NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, most n-i-p structure perovskite devices have photocurrent hysteresis, and p-i-n structure devices using fullerene materials as electron transport layers can effectively reduce photocurrent hysteresis, but fullerene materials and metal electrodes Fermi energy The level is not completely matched, and, in general, the efficiency of p-i-n type perovskite solar cells is generally lower than that of n-i-p type pe

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  • Perovskite solar cell and preparation method for same
  • Perovskite solar cell and preparation method for same
  • Perovskite solar cell and preparation method for same

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Embodiment 1

[0029] Such as figure 1 As shown, a perovskite solar cell is composed of a conductive substrate 1, a hole transport layer 2, a perovskite layer 3, an electron transport layer 4, a cathode modification layer 5, and a metal cathode 6 from bottom to top. Layer 5 uses amphiphilic fluorenyl polymers containing polar groups to replace the traditional inorganic compound cathode modification layer, and uses the interfacial dipole effect of polar group hydroxyl groups to reduce the potential between the metal cathode 6 and the electron transport layer 4. Barriers, reduce interfacial recombination, and improve the performance of perovskite batteries. The metal cathode 6 has a thickness of 80nm; the cathode modification layer 5 has a thickness of 5nm, the electron transport layer 4 has a thickness of 90nm, the perovskite layer 3 has a thickness of 350nm, and the hole transport layer 2 has a thickness of 15nm.

[0030] The conductive substrate 1 is ITO conductive glass.

[0031] The hol...

Embodiment 2

[0040] Such as figure 1 As shown, a perovskite solar cell is composed of a conductive substrate 1, a hole transport layer 2, a perovskite layer 3, an electron transport layer 4, a cathode modification layer 5, and a metal cathode 6 from bottom to top. Layer 5 uses amphiphilic fluorenyl polymers containing polar groups to replace the traditional inorganic compound cathode modification layer, and uses the interfacial dipole effect of polar group hydroxyl groups to reduce the potential between the metal cathode 6 and the electron transport layer 4. Barriers, reduce interfacial recombination, and improve the performance of perovskite batteries. The metal cathode 6 has a thickness of 50nm; the cathode modification layer 5 has a thickness of 10nm, the electron transport layer 4 has a thickness of 150nm, the perovskite layer 3 has a thickness of 500nm, and the hole transport layer 2 has a thickness of 30nm.

[0041] The conductive substrate 1 is FTO conductive glass.

[0042] The h...

Embodiment 3

[0050] like figure 1 As shown, a perovskite solar cell is composed of a conductive substrate 1, a hole transport layer 2, a perovskite layer 3, an electron transport layer 4, a cathode modification layer 5, and a metal cathode 6 from bottom to top. Layer 5 uses a copolymer of amphiphilic fluorenyl and phenyl containing polar groups to replace the traditional inorganic compound cathode modification layer, and uses the interfacial dipole effect of the polar group hydroxyl group to reduce the metal cathode 6 and the electron transport layer 4. The potential barrier between them can reduce the interfacial recombination effect and improve the performance of perovskite batteries. The metal cathode 6 has a thickness of 150nm; the cathode modification layer 5 has a thickness of 8nm, the electron transport layer 4 has a thickness of 50nm, the perovskite layer 3 has a thickness of 300nm, and the hole transport layer 2 has a thickness of 20nm.

[0051] The conductive substrate 1 is a fl...

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Abstract

The invention discloses a perovskite solar cell and a preparation method for the same. The perovskite solar cell sequentially comprises a conductive substrate, a hole transport layer, a perovskite layer, an electron transport layer, a cathode modification layer and a metal cathode from bottom to top, wherein the cathode modification layer comprises a conjugate polymer of which side chains contain at least two hydroxyl groups; the conjugate polymer comprises a conjugate main chain, the conjugate main chain comprises conjugate units A and B which are connected with each other, each of the conjugate units A and B comprises fluorene, dibenzothiophene, thianaphthene, BT, DBT or a phenyl group, the conjugate units A and B are connected with different side chains in which one side chain contains 2 to 6 hydroxyl groups. According to the perovskite solar cell and the preparation method for the same, an interface dipole modification effect is achieved by virtue of polar groups, so that the potential barrier between the metal cathode and the electron transport layer is reduced, the interface recombination effect is alleviated, and the performance of the perovskite solar cell is improved.

Description

technical field [0001] The invention relates to a perovskite solar cell and a preparation method thereof, belonging to the technical field of fuel cells. Background technique [0002] The compound with calcium titanate crystal structure is called perovskite crystal, with CH 3 NH 3 PB 3 The representative perovskite material is widely used as the active layer of solar cells. Compared with organic semiconductor materials, it has the characteristics of wide absorption spectrum and high absorption coefficient. It also has good bipolar charge mobility and a diffusion length much higher than that of organic semiconductor materials. Organic semiconductor materials (about 10nm). At present, the efficiency of perovskite solar cells has reached the application requirements, but its stability is the key to its practical application. [0003] At present, most n-i-p structure perovskite devices have photocurrent hysteresis, and p-i-n structure devices using fullerene materials as ele...

Claims

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Application Information

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IPC IPC(8): H01L51/46H01L51/44H01L51/48
CPCH10K71/12H10K85/151H10K30/81Y02E10/549
Inventor 朱同波文贵华黄林刘建国吴聪萍邹志刚
Owner KUSN INNOVATION INST OF NANJING UNIV
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