Trans-solar cell preparation method based on seed crystal induced growth perovskite thin film
A solar cell and perovskite technology, applied in crystal growth, single crystal growth, single crystal growth, etc., can solve problems such as transformation and poor crystallization quality of formamidinyl perovskite, reduce grain boundaries, and improve photoelectricity Conversion efficiency, the effect of suppressing the hysteresis phenomenon of positive and negative scanning
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[0031] The present invention first specifically describes a method for preparing a trans-solar cell based on a seed crystal-induced growth perovskite film, and the steps are as follows:
[0032] S1, the CsPbBr 3 Nanocrystals were dispersed in dimethyl sulfoxide solvent to obtain self-dispersing seed crystal solution, and lead iodide PbI 2 and formamidine iodide FAI dissolved in dimethylformamide DMF solution to obtain FAPbI without methylammonium component 3 Precursor solution, the FAPbI 3 The precursor solution is mixed with the self-dispersing seed crystal solution to form a seed crystal-containing perovskite precursor solution, which is left to stand for aging.
[0033] It should be noted that the CsPbBr of the present invention 3 Nanocrystals can be inorganic CsPb and PbBr 2 As a raw material, it is synthesized by a solution method or an anti-solvent capture method. The following provides a solution method to prepare CsPbBr 3 The method of nanocrystals is as follows:...
Embodiment 1
[0048] This embodiment provides a method for preparing a trans-solar cell based on seed crystal-induced growth of perovskite thin films, which utilizes self-dispersing seed crystal solutions to induce growth of methylammonium (MA)-free perovskite thin films, and is applied to trans-( p-i-n) structure perovskite solar cell, the preparation method specifically includes the following process steps:
[0049] 1) ITO substrate preparation:
[0050] The specifications used are light transmittance≥84%, square resistance≤15Ω, 15mm×15mm Sn-doped In 2 O 3 (ITO) conductive glass was used as the device substrate material, and the ITO substrate was subjected to ultraviolet ozone treatment for use.
[0051] 2) Preparation of hole transport layer:
[0052] Using polymer PTAA material as the hole transport layer material, spin coating on the ITO substrate after UV ozone treatment to form the hole transport layer.
[0053] 3) Preparation of light absorbing layer:
[0054] CsPbBr 3 Nanocry...
Embodiment 2
[0078] This embodiment provides a method for preparing a trans-solar cell based on seed crystal-induced growth of perovskite thin films, which utilizes self-dispersing seed crystal solutions to induce growth of methylammonium (MA)-free perovskite thin films, and is applied to trans-( p-i-n) structure perovskite solar cell, the preparation method specifically includes the following process steps:
[0079] 1) ITO substrate preparation:
[0080] The specifications used are light transmittance≥84%, square resistance≤15Ω, 15mm×15mm Sn-doped In 2 O 3 (ITO) conductive glass was used as the device substrate material, and the ITO substrate was subjected to ultraviolet ozone treatment for use.
[0081] 2) Preparation of hole transport layer:
[0082] Using the small molecular organic 2PACZ material as the hole transport layer material, the small molecular organic 2PACZ was dissolved in ethanol to form a solution with a concentration of 0.35 mmol / L, and the solution was spin-coated on...
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