Recent advances in ionic molecules applied in perovskite solar cells

Xie, Yuansi; Wu, Bo; Gao, Deqing

doi:10.1039/d4tc00255e

Cited by 2 publications

(2 citation statements)

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“…32 In general, organic small molecules containing phosphoric and carboxylic acids are among the most frequently used passivation agents of SnO 2 ETL. 33 T h i s c o n t e n t i s However, amino acid polymers with biological activity are rarely used as passivation agents, and even less research has been done on their impact mechanisms. Polyaspartic acid (PASP) is an amino acid polymer that naturally exists in the shells of snails and mollusks and is a biodegradable and environmentally friendly metal ion chelating agent.…”

Section: Introductionmentioning

confidence: 99%

“…MOACl improves the film quality of SnO 2 , boosting the overall PCE of the cells to 24.34% . In general, organic small molecules containing phosphoric and carboxylic acids are among the most frequently used passivation agents of SnO 2 ETL . However, amino acid polymers with biological activity are rarely used as passivation agents, and even less research has been done on their impact mechanisms.…”

Section: Introductionmentioning

confidence: 99%

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Natural Chelating Agent-Treated Electron Transfer Layer for Friendly Environmental and Efficient Perovskite Solar Cells

Geng,

Zhang,

Sui

et al. 2024

ACS Appl. Mater. Interfaces

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In perovskite solar cells (PSCs), the electron transfer layer (ETL) characteristics have significant effects on the photoelectric conversion efficiency (PCE) of the devices. Herein, a natural chelating agent polymer polyaspartic acid (PASP) is doped into the SnO 2 precursor solution attributed to a strong interaction between PASP molecules and SnO 2 , which strengthens the interface contact and passivates the vacancy oxygen trap of the obtained SnO 2 ETL, thus promoting the transfer of electrons. In addition, PASP can also regulate the growth of perovskite crystals, leading to an improved crystal quality of the perovskite films. Meanwhile, there is an excellent chelate anchoring of PASP to uncoordinated Pb 2+ , facilitating the reduction of trap defects at the interface, improving the stability of device, and suppressing the leakage of toxic Pb. Finally, the photovoltaic performance of the optimized device was greatly improved, and the PCE was increased from 21.22 to 23.49%, with outstanding environmental stability. This work provides an inexpensive and efficient treatment strategy that improves the performance and stability of friendly environmental PSCs.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%