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Solar cell and method for manufacturing the same

A technology of solar cells and electrodes, applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as the inability to form perovskite layers

Active Publication Date: 2016-01-27
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the solvent in the next coating process will dissolve the perovskite film formed in the previous coating process. Formation of compositionally graded perovskite layers

Method used

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  • Solar cell and method for manufacturing the same
  • Solar cell and method for manufacturing the same
  • Solar cell and method for manufacturing the same

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Experimental program
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Effect test

Embodiment 1

[0044] Please refer to image 3 , electrode 19 is 90nm TiO 2 layer, the electrode 31 is a thin film of gold, and the composition of the conversion layer 17 near the electrode 19 (Pb(CH 3 NH 3 ) I 3 ) whose thickness continues to be about 300nm, while the composition of Pb(CH 3 NH 3 )[I x Br (1-x) ] 3 The thickness continues 100nm until Pb(CH 3 NH 3 )Br 3 . The energy gap diagram of the above-mentioned conversion layer 17 is as follows Figure 8A shown. Through the simulation calculation of AMPS-1D, the open circuit voltage of this battery is 1.284V, the short circuit current is 21.136mA / cm2, the fill factor is 0.840, and the conversion efficiency is 22.807%.

Embodiment 2

[0046] Please refer to image 3 , electrode 19 is 90nm TiO 2 layer, the electrode 31 is a thin film of gold, and the conversion layer 17 is sequentially divided into three regions from the electrode 19 to the electrode 31, which are respectively (1) Pb(CH 3 NH 3 )[I x Br (1-x) ] 3 , whose thickness continues about 50nm until Pb(CH 3 NH 3 ) I 3 , and its energy gap gradually changes from 1.5eV, 1.6eV, 1.8eV, 2.0eV and 2.3eV to 1.5eV; (2) Pb(CH 3 NH 3 ) I 3 , with a thickness of about 300 nm and an energy gap of 1.5 eV; and (3) Pb(CH 3 NH 3 )[I x Br (1-x) ] 3 , whose thickness continues 50nm until Pb(CH 3 NH 3 )Br 3 , and its energy gap gradually increases to 2.3eV. The energy gap diagram of the above-mentioned conversion layer 17 is as follows Figure 8B shown. The open circuit voltage, short circuit current, fill factor and conversion efficiency of the battery are shown in Table 1 through the simulation calculation of AMPS-1D.

[0047] Table 1

[0048] ...

Embodiment 3

[0050] Please refer to image 3 , electrode 19 is 90nm TiO 2 The electrode 31 is a thin film of gold, and the conversion layer 17 is divided into three regions in sequence from the electrode 19 to the electrode 31, which are respectively (1) Pb(CH 3 NH 3 )[I x Br (1-x) ] 3 , whose thickness continues about 50nm, 100nm, 200nm, 300nm or 350nm until Pb(CH 3 NH 3 ) I 3 , and its energy gap gradually changes from 1.6eV to 1.5eV; (2) Pb(CH 3 NH 3 )I 3 , with a thickness of about 300nm, 250nm, 150nm, 50nm, or 0nm, and an energy gap of 1.5eV; and (3) Pb(CH 3 NH 3 )[I x Br (1-x) ] 3 , whose thickness continues 50nm until Pb(CH 3 NH 3 )Br 3 , and its energy gap gradually increases to 2.3eV. The energy gap diagram of the above-mentioned conversion layer 17 is as follows Figure 8C shown. Through theoretical calculation, the open circuit voltage, short circuit current, fill factor and conversion efficiency of this battery are shown in Table 2.

[0051] Table 2

[005...

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Abstract

The invention discloses a solar cell. The solar cell includes a first electrode, a second electrode, and a first conversion layer disposed therebetween. The first electrode is closer to a light incident side than the second electrode. The first conversion layer is a composition-gradient perovskite layer. A part of the first conversion layer adjacent to the first electrode has an energy gap less than that of a part of the first conversion layer adjacent to the second electrode.

Description

technical field [0001] The present invention relates to a perovskite conversion layer of a solar cell, more particularly to a graded composition of the perovskite conversion layer and a method for forming the same. Background technique [0002] Organometallic perovskite materials have excellent physical properties and are one of the potential materials for solar cells. Organolead halide perovskites are currently the most efficient perovskite materials. The current process is mainly a coating method, such as dissolving two precursors of perovskite together in an organic solvent (such as DMF), and then spin-coating on the electrode. On the other hand, lead halides (PbX 2 ) was dissolved in an organic solvent and spin-coated on the electrode, and then the PbX 2 Pb(CH 3 NH 3 )X 2 I. However, the solvent in the next coating process will dissolve the perovskite film formed in the previous coating process. A compositionally graded perovskite layer is formed. [0003] In su...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCY02E10/549Y02P70/50H10K71/16H10K30/151H10K85/50H10K30/50H10K85/30H10K30/20
Inventor 李佳桦许弘儒刘永宗张书哝蔡松雨林福铭
Owner IND TECH RES INST