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Perovskite solar cell based on PVA modified hole transport layer

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

Active Publication Date: 2018-11-16
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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  • Perovskite solar cell based on PVA modified hole transport layer
  • Perovskite solar cell based on PVA modified hole transport layer
  • 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 discloses a perovskite solar cell based on a PVA modified hole transport layer. The perovskite solar cell comprises a lower transparent electrode layer and an upper electrode layer, wherein five functional layers are clamped between the lower transparent electrode layer and the upper electrode layer; the five functional layers comprise a hole transport layer, a PVA interface modification layer, a perovskite active layer, an electron transfer layer and a buffer layer from bottom to top in sequence; and the hole transport layer, the PVA interface modification layer, the perovskiteactive layer and the electron transfer layer are prepared into a film through a low-temperature solution method. The thin film is prepared by using the low-temperature solution method, the technological conditions are reasonably controlled, and the PVA modification layer is added between a PEDOT:PSS layer and a perovskite layer, the perovskite surface wettability is improved effectively, the holetransport efficiency is improved, the perovskite thin film is obtained continuously and uniformly, the quality of a perovskite absorbed layer is improved, and the obtained perovskite solar cell is high in photovoltaic conversion efficiency and high in 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 Applications(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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