A perovskite solar cell based on pva modified hole transport layer

A hole transport layer and solar cell technology, applied in the field of solar cells, can solve the problems of restricting visible light absorption and current density, and achieve the effects of high photoelectric conversion efficiency, low cost, and improved surface wettability

Active Publication Date: 2022-04-22
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitations of film thickness, material characteristics and preparation process of perovskite thin-film solar cells, its thickness is usually about several hundred nanometers, which restricts its absorption of visible light to a certain extent and restricts its current density.

Method used

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  • A perovskite solar cell based on pva modified hole transport layer
  • A perovskite solar cell based on pva modified hole transport layer
  • A perovskite solar cell based on pva modified hole transport layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] according to figure 1 The solar cell structure schematic diagram is used to prepare the device, and the preparation method includes:

[0025] Wash commercial ITO twice with washing solution, deionized water, acetone, and ethanol for 15 minutes each, then blow dry with nitrogen, and treat with plasma for 4 minutes;

[0026] The cleaned and plasma-treated ITO glass was spin-coated on a homogenizer at a speed of 4000 rpm for 30 seconds to prepare a hole transport layer PEDOT:PSS and annealed on a hot stage at 130°C for 20 minutes;

[0027] Dissolve PVA in deionized water at a concentration of 0.25mg / ml, heat and stir at 95°C to fully disperse PVA, spin-coat at 900rpm for 15s, and spin-coat at 4000rpm for 25s in two steps of continuous spin-coating, at 100°C in a glove box environment Anneal for 10 minutes;

[0028] Make lead iodide and methylamine lead iodide into a solution with a concentration of 1.4mmol / ml according to the molar ratio of 1:1, in which the solvent is a...

Embodiment 2

[0032] according to figure 1 The solar cell structure schematic diagram is used to prepare the device, and the preparation method includes:

[0033] Wash commercial ITO twice with washing solution, deionized water, acetone, and ethanol for 15 minutes each, then blow dry with nitrogen, and treat with plasma for 4 minutes;

[0034] The cleaned and plasma-treated ITO glass was spin-coated on a homogenizer at a speed of 4000 rpm for 30 seconds to prepare a hole transport layer PEDOT:PSS and annealed on a hot stage at 130°C for 20 minutes;

[0035]Dissolve PVA in deionized water at a concentration of 0.5mg / ml, heat and stir at 95°C to fully disperse PVA, spin-coat at 900rpm for 15s, and spin-coat at 4000rpm for 25s in two steps of continuous spin-coating, at 100°C in a glove box environment Anneal for 10 minutes;

[0036] Make lead iodide and methylamine lead iodide into a solution with a concentration of 1.4mmol / ml according to the molar ratio of 1:1, in which the solvent is a m...

Embodiment 3

[0040] according to figure 1 The solar cell structure schematic diagram is used to prepare the device, and the preparation method includes:

[0041] Wash commercial ITO twice with washing solution, deionized water, acetone, and ethanol for 15 minutes each, then blow dry with nitrogen, and treat with plasma for 4 minutes;

[0042] The cleaned and plasma-treated ITO glass was spin-coated on a homogenizer at a speed of 4000 rpm for 30 seconds to prepare a hole transport layer PEDOT:PSS and annealed on a hot stage at 130°C for 20 minutes;

[0043] Dissolve PVA in deionized water at a concentration of 0.75mg / ml, heat and stir at 95°C to fully disperse PVA, spin-coat at 900rpm for 15s, and spin-coat at 4000rpm for 25s in two steps of continuous spin-coating, at 100°C in a glove box environment Anneal for 10 minutes;

[0044] Make lead iodide and methylamine lead iodide into a solution with a concentration of 1.4mmol / ml according to the molar ratio of 1:1, in which the solvent is a...

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Abstract

The invention is a perovskite solar cell based on a PVA modified hole transport layer, comprising a lower transparent electrode layer and an upper electrode layer, five functional layers are sandwiched between the lower transparent electrode layer and the upper electrode layer, and the five functional layers From bottom to top are hole transport layer, PVA interface modification layer, perovskite active layer, electron transport layer and buffer layer, the hole transport layer, PVA interface modification layer, perovskite active layer, electron transport layer All films were prepared by low-temperature solution method. The invention adopts a low-temperature solution method to prepare thin films, reasonably controls the process conditions, and adds a PVA modification layer between the PEDOT:PSS layer and the perovskite layer, which effectively improves the surface wettability of the perovskite, improves the hole transport efficiency, and produces a continuous The uniform perovskite thin film improves the quality of the perovskite absorbing layer, and the obtained perovskite solar cell has high photoelectric conversion efficiency and good stability.

Description

technical field [0001] The invention belongs to the field of solar cells, and in particular relates to a perovskite solar cell based on a PVA-modified hole transport layer and a preparation method thereof. Background technique [0002] With the increasing development of heavy industry, non-renewable resources such as coal and oil are frequently in urgent need, and energy issues have increasingly become the bottleneck of international social and economic development. Coupled with the improper use of non-renewable resources, environmental problems have become more serious and human survival has been greatly threatened; solar energy Environmentally friendly and renewable resources such as solar cells are increasingly concerned by human beings. Solar cells are an important way for human society to deal with the crisis of energy depletion and solve environmental pollution problems. [0003] A solar cell is a device that directly converts light energy into electrical energy throug...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/46H01L51/42H01L51/48
CPCH10K71/12H10K85/151H10K30/30Y02E10/549
Inventor 闵永刚刘泽崔岱麒邓云恺唐亚楠
Owner NANJING UNIV OF POSTS & TELECOMM
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