Enhanced molecular interaction by polymer additive for efficient and stable flexible perovskite solar cells

Lei, Ning; Song, Lixin; Wen, Xian; Gu, Ningxia; Du, Pingfan; Yu, Jinchao; Xiong, Jie

doi:10.1007/s10853-022-07930-1

Cited by 3 publications

(3 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The ideal factor calculated form the fitting curves declined from 1.69 to 1.31 after doping with p(HEMA-co-DEAMA), implying it can suppress trapassisted nonradiative recombination. 24 Similarly, Figure 3b displayed the dependence of J SC on light intensity, where the inhibition of bimolecular recombination is stronger when the α value is closer to 1. Here, the α value of the p(HEMA-co- DEAMA) modified device is 0.982, which is closer to 1 than the control device's 0.950, demonstrating that the carrier loss caused by bimolecular recombination in the p(HEMA-co-DEAMA) modified device is reduced.…”

Section: Resultsmentioning

confidence: 87%

“…The relation between light intensity ( I p ) and V OC is as follows where e is the elementary charge, T is the absolute temperature, K B is the Boltzmann constant, n is the ideal factor, and I p is the light intensity. The ideal factor calculated form the fitting curves declined from 1.69 to 1.31 after doping with p(HEMA- co -DEAMA), implying it can suppress trap-assisted nonradiative recombination . Similarly, Figure b displayed the dependence of J SC on light intensity, where the inhibition of bimolecular recombination is stronger when the α value is closer to 1.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Defect Passivation Enabled by Amphiphilic Polymer Additives for Perovskite Solar Cells with Suppressed Charge Recombination

Ke,

Xiong,

et al. 2024

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Harmful defects are typically major performance and stability degrading factors in perovskite solar cells (PSCs). In order to prevent defect formation and ion migration, some small molecule additives are often used in PSCs, which, however, are highly volatile and very likely to drift. In this work, an amphiphilic polymer, p(HEMA-co-DEAMA), is synthesized and doped into organic salt solution. Through Lewis base coordination and hydrogen bonding, it can be chemically bonded to a perovskite. Further analysis reveals that trap density is significantly reduced after simple treatment with p(HEMA-co-DEAMA), suppressing charge recombination and boosting the power conversion efficiency (PCE) of PSCs. Moreover, the ordered long chain structure of p(HEMA-co-DEAMA) forms a gridlike crystal, which stitches the grain boundaries and thus modulates the growth of perovskite crystals therein. Importantly, the exposure of the long alkyl chains on p(HEMA-co-DEAMA) also provides a hydrophobic coating, which protects the perovskite film from environmental humidity and further enhances the operation stability. Therefore, the unpackaged devices modified with p(HEMA-co-DEAMA) exhibit excellent stability with retaining more than 90% of the original PCE when stored for 1000 h in an air environment, indicating the viability of our strategies.

show abstract

Section: Resultsmentioning

confidence: 87%

Section: Resultsmentioning

confidence: 99%

Defect Passivation Enabled by Amphiphilic Polymer Additives for Perovskite Solar Cells with Suppressed Charge Recombination

Ke,

Xiong,

et al. 2024

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…Ning et al blended a biodegradable polymer macromolecule, poly( d , l -lactide) (PDLLA) into precursor solutions, to fabricate MAPbI 3 films with good crystallinity. 83 The Fourier transform infrared (FTIR) spectra show that the CO groups and O–H groups stretching vibration in perovskite films containing PDLLA were at about 1738 and 3457 cm −1 , respectively (Fig. 6(a)).…”

Section: Additive-controlled Growthmentioning

confidence: 99%