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Lead-free perovskite solar cell

A solar cell, lead-free perovskite technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of lead element toxicity, high cost of metal electrodes, poor thermal stability of hole transport layers, etc. Sexual problems, reduce expensive effects

Inactive Publication Date: 2017-10-10
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Technical problem to be solved: the purpose of the present invention is to solve the technical problems of lead element toxicity of perovskite materials, poor thermal stability of hole transport layer and high cost of metal electrodes existing in perovskite solar cells, and provide a new type of fully Inorganic lead-free perovskite solar cell devices

Method used

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Embodiment 1

[0033] After the glass substrate covered with fluorine-doped tin oxide (FTO) was ultrasonically washed with detergent aqueous solution, deionized water, alcohol and acetone, TiO was wet spin-coated on the substrate. 2 , with a thickness of 100nm.

[0034] Then spin-coated CsSnBr with a thickness of 200 nm 3 For the lead-free perovskite layer, after heat treatment at 200 degrees for 20 minutes, put it into a vacuum evaporation machine to thermally evaporate a 60nm molybdenum oxide film and a 150nm aluminum electrode. Such as figure 2 As shown, the prepared solar cell has 7.85 mAcm -2 Short-circuit current, open-circuit voltage of 0.33 V, fill factor of 0.34, and cell efficiency of 0.88%.

Embodiment 2

[0036] After the glass substrate covered with indium tin oxide (ITO) was ultrasonically washed with aqueous detergent solution, deionized water, alcohol and acetone, CuI with a thickness of 150 nm was prepared on the substrate by vacuum evaporation method, and then CuI with a thickness of 100 nm was prepared continuously. SnBr 2 and a 100nm CsBr film, and then prepare a 100nm zinc oxide film by wet method, and finally prepare a 150nm aluminum alloy electrode containing 5% Li in vacuum, and anneal the prepared device at 230 degrees for 60 minutes in an anhydrous and oxygen-free environment 2 React with CsI to generate CsSnIBr 2 Lead-free perovskite layer. The as-prepared solar cell has a 7.56 mAcm -2 Short-circuit current, open-circuit voltage of 0.31V, fill factor of 0.32, and cell efficiency of 0.76%.

[0037]Above, the lead-free perovskite solar cell of the present invention can be known from the result of Example 1, using CsSnBr 3 Perovskite compound, inorganic electron...

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Abstract

The invention discloses a lead-free perovskite solar cell, which comprises a first electrode, a first carrier transport layer, a lead-free perovskite compound layer, and a second carrier transport layer arranged in sequence from bottom to top on a substrate and a second electrode, wherein the lead-free perovskite compound layer is made of a perovskite compound; the first electrode is a transparent conductive electrode, and the second electrode is an opaque metal electrode; the first carrier transport layer, the second carrier transport layer is made of an n-type metal compound with electron transport properties or a p-type metal compound with hole transport properties. The lead-free perovskite solar cell uses lead-free perovskite active materials, which avoids the environmental protection problem of recycling after device failure; uses inorganic metal compound semiconductors for the hole transport layer, which solves the problem of using organic semiconductor hole transport materials. Thermal problems; metal electrodes do not use precious metals silver, platinum and gold, which reduces the problem of expensive electrode materials in device preparation.

Description

technical field [0001] The invention belongs to the technical field of photoelectric devices, and in particular relates to a lead-free perovskite solar cell. Background technique [0002] Due to the non-renewability of fossil energy, environmental protection and greenhouse effect issues during use, solar cell devices have received widespread attention. However, the high cost of conventional silicon-based solar cells is a factor hindering popularization. In recent years, perovskite solar cells based on lead perovskite materials as light-absorbing materials have achieved rapid development, and the efficiency of solar cell devices has reached more than 20%, which has certain commercial application value. [0003] Lead perovskite solar cells can be divided into two types: porous structure and planar structure. The planar structure is further divided into planar p-i-n structure and planar n-i-p structure based on transparent electrodes. Due to the simple preparation process o...

Claims

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Application Information

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IPC IPC(8): H01L31/0224H01L31/032H01L31/062
CPCY02E10/50H01L31/062H01L31/022425H01L31/032
Inventor 高志强密保秀童彧
Owner NANJING UNIV OF POSTS & TELECOMM
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