Preparation method of large-grain perovskite thin film
A perovskite and large-grain technology, applied in semiconductor/solid-state device manufacturing, photovoltaic power generation, electrical components, etc., can solve problems such as difficulty in meeting commercial application standards, high preparation environment requirements, and shortened carrier lifetime. Achieve low cost, prolong carrier life, and reduce internal defects
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[0032] Example 1
[0033] (1) According to the general chemical formula FA 0.8 Cs 0.2 PbI 2.68 Br 0.32 Weigh the corresponding amount of 0.1376gFAI, 0.052gCsI, 0.3872gPbI 2 And 0.0588gPbBr 2 As a precursor material of perovskite;
[0034] (2) According to the mass ratio of the precursor material to the solvent of 40%, take 0.8 mL of the DMF and DMSO mixed solvent as the perovskite precursor for use;
[0035] (3) Dissolve the precursor material in step (1) in the precursor solution in (2) to form a yellow perovskite solution for use;
[0036] (4) Weigh Pb(SCN) with a molar ratio of 1% of the precursor material 2 0.0032g is added as an additive to the solution of step (3);
[0037] (5) Keep the perovskite solution obtained in step (4) at room temperature for 2 hours under magnetic stirring conditions;
[0038] (6) Drop the precursor solution obtained in step (5) onto the prepared substrate and spin-coating to obtain the perovskite film. The spin-coating process is divided into two stages. ...
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[0042] Example 2
[0043] (1) According to the general chemical formula FA 0.8 Cs 0.2 PbI 2.68 Br 0.32 Weigh the corresponding amount of 0.1376gFAI, 0.052gCsI, 0.3872gPbI 2 And 0.0588gPbBr 2 As a precursor material of perovskite;
[0044] (2) According to the mass ratio of the precursor material to the solvent of 40%, take 0.8 mL of the DMF and DMSO mixed solvent as the perovskite precursor for use;
[0045] (3) Dissolve the precursor material in step (1) in the precursor solution in (2) to form a yellow perovskite solution for use;
[0046] (4) Weigh Pb(SCN) with a molar ratio of 2% of the precursor material 2 0.0064g is added as an additive to the solution of step (3);
[0047] (5) Keep the perovskite solution obtained in step (4) at room temperature for 3 hours under magnetic stirring conditions;
[0048] (6) Drop the precursor solution obtained in step (5) onto the prepared substrate and spin-coating to obtain the perovskite film. The spin-coating process is divided into two stages. ...
Example Embodiment
[0051] Example 3
[0052] (1) According to the general chemical formula FA 0.8 Cs 0.2 PbI 2.68 Br 0.32 Weigh the corresponding amount of 0.1376gFAI, 0.052gCsI, 0.3872gPbI 2 And 0.0588gPbBr 2 As a precursor material of perovskite;
[0053] (2) According to the mass ratio of the precursor material to the solvent of 40%, take 0.8 mL of the DMF and DMSO mixed solvent as the perovskite precursor for use;
[0054] (3) Dissolve the precursor material in step (1) in the precursor solution in (2) to form a yellow perovskite solution for use;
[0055] (4) Weigh Pb(SCN) with a molar ratio of 3% of the precursor material 2 0.0096g is added as an additive to the solution of step (3);
[0056] (5) Keep the perovskite solution obtained in step (4) at room temperature for 2 hours under magnetic stirring conditions;
[0057] (6) Drop the precursor solution obtained in step (5) onto the prepared substrate and spin-coating to obtain the perovskite film. The spin-coating process is divided into two stages. ...
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