Enhancing the Efficiency and Stability of Perovskite Solar Cells through Defect Passivation and Controlled Crystal Growth Using Allantoin

Alexander, Akhil; Kamalon, Vishnupriya P.; Dev, Vivek V.; Raees A, Muhammed; Reghunathan, Sidharth; Nair, Pradeep R.; Namboothiry, Manoj A. G.

doi:10.1021/acsami.3c13591

Cited by 4 publications

(2 citation statements)

References 78 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the XRD patterns of the two perovskite films illustrated in figure 3 i , three major peaks located at 14.3°, 28.6°, and 32.0° were assigned to (001), (002), and (012) crystal planes, respectively [ 51 , 52 ]. Compared to the HT-SnO 2 /perovskite film, the SnO x /perovskite film displayed increased relative intensity at both (001) and (002) peaks (electronic supplementary material, table S3), indicating enhanced crystallinity of the perovskite film with preferential growth along (001) and (002) planes [ 52 , 53 ]. Overall, the data showed that the SnO x /perovskite film exhibited enlarged grains, improved morphology, and enhanced crystallinity.…”

Section: Resultsmentioning

confidence: 99%

Inkjet-printed SnO _x as an effective electron transport layer for planar perovskite solar cells and the effect of Cu doping

Lu,

Yang,

Dun

et al. 2024

R. Soc. Open Sci.

View full text Add to dashboard Cite

Inkjet printing is a more sustainable and scalable fabrication method than spin coating for producing perovskite solar cells (PSCs). Although spin-coated SnO 2 has been intensively studied as an effective electron transport layer (ETL) for PSCs, inkjet-printed SnO 2 ETLs have not been widely reported. Here, we fabricated inkjet-printed, solution-processed SnO x ETLs for planar PSCs. A champion efficiency of 17.55% was achieved for the cell using a low-temperature processed SnO x ETL. The low-temperature SnO x exhibited an amorphous structure and outperformed high-temperature crystalline SnO 2 . The improved performance was attributed to enhanced charge extraction and transport and suppressed charge recombination at ETL/perovskite interfaces, which originated from enhanced electrical and optical properties of SnO x , improved perovskite film quality, and well-matched energy level alignment between the SnO x ETL and the perovskite layer. Furthermore, SnO x was doped with Cu. Cu doping increased surface oxygen defects and upshifted energy levels of SnO x , leading to reduced device performance. A tunable hysteresis was observed for PSCs with Cu-doped SnO x ETLs, decreasing at first and turning into inverted hysteresis afterwards with increasing Cu doping level. This tunable hysteresis was related to the interplay between charge/ion accumulation and recombination at ETL/perovskite interfaces in the case of electron extraction barriers.

show abstract

Section: Resultsmentioning

confidence: 99%

Inkjet-printed SnO _x as an effective electron transport layer for planar perovskite solar cells and the effect of Cu doping

Lu,

Yang,

Dun

et al. 2024

R. Soc. Open Sci.

View full text Add to dashboard Cite

show abstract

“…PAAm, a low-cost and readily available polymer, was demonstrated to effectively reduce the aggregation of SnO 2 nanoparticles and obtain high-quality and high-coverage thin films. The polymer containing large amounts of amino groups was proven to form hydrogen bonds with I – ions of the perovskite’s A-site cations, , which benefited the enhancement of the perovskite film growth. The resulting perovskite film’s defects were reduced, leading to a suppressed nonradiative recombination and reduced open circuit voltage loss.…”

Section: Introductionmentioning

confidence: 99%

One-Stone-for-Two-Birds Method to Improve the SnO₂ Layers for High Power-per-Weight Flexible Perovskite Solar Cell Mini-modules

Zhang,

Gang,

Jiang

et al. 2024

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Maintaining the power conversion efficiency (PCE) of flexible perovskite solar cells (fPSCs) while decreasing their weight is essential to utilize their lightweight and flexibility as much as possible for commercialization. Strengthening the interfaces between functional layers, such as flexible substrates, charge transport layers, and perovskite active layers, is critical to addressing the issue. Herein, we propose a feasible and one-stone-for-two-birds method to improve the electron transport layer (ETL), SnO2, and the interface between the ETL and perovskite layer simultaneously. In detail, poly(acrylate ammonium) (PAAm), a low-cost polymer with a long chain structure, is added into the SnO2 aqueous solution to reduce the aggregation of SnO2 nanoparticles, resulting in the deposition of a conformal and high-quality ETL film on the tin-doped indium oxide film surface. Simultaneously, PAAm addition can effectively regulate the crystallization of the perovskite films, strengthening the interface between the SnO2 film and the buried surface of the perovskite layer. The outstanding PCEs of 22.41% on small-scale fPSCs and 18.54% on fPSC mini-modules are among the state-of-the-art n-i-p type fPSCs. Moreover, the fPSC mini-module on the 20 μm-thick flexible substrate shows a comparable PCE with that of the fPSC mini-module on the 125 μm-thick flexible substrate, exhibiting a high power-to-weight of 5.097 W/g. This work provides an easy but essential direction for further applications of fPSCs in diverse scenarios.

show abstract

Revealing Defect Passivation and Charge Extraction by Ultrafast Spectroscopy in Perovskite Solar Cells through a Multifunctional Lewis Base Additive Approach

Majhi,

Sridevi,

Jain

et al. 2024

Solar RRL

View full text Add to dashboard Cite

Defect passivation inside the crystal lattice and the grain‐boundary (GB) surface of the perovskite films has become the most effective strategy to suppress the negative impact of the nonradiative recombination in perovskite solar cell. In this study, a unique approach to effectively passivate the defect states of MAPbI3 perovskite thin film using thionicotinamide (TNM) as a multifunctional Lewis base additive is demonstrated. TNM as an additive with three different types of Lewis base sites, i.e., pyridine, amino, and CS functional groups, is introduced to mitigate the trap states in the TNM‐modified perovskite films and thoroughly investigate the passivation defects. The nonbonded electron of the three different Lewis base sites can synergistically passivate the antisite lead (Pb) defects and improve the stability of the device. In addition, the NH2 group can form ionic bonds with negatively charged I– ions and inhibit ion migration caused by them. It is found that such passivation effect of TNM reduces the GB defects and improves the crystallinity significantly. As a result, a champion TNM‐modified device shows an improved power conversion efficiency of 19.26% from 16.86% along with enhanced open‐circuit voltage, fill factor, and negligible hysteresis.

show abstract

Enhancing the Efficiency and Stability of Perovskite Solar Cells through Defect Passivation and Controlled Crystal Growth Using Allantoin

Cited by 4 publications

References 78 publications

Inkjet-printed SnO _x as an effective electron transport layer for planar perovskite solar cells and the effect of Cu doping

Inkjet-printed SnO _x as an effective electron transport layer for planar perovskite solar cells and the effect of Cu doping

One-Stone-for-Two-Birds Method to Improve the SnO₂ Layers for High Power-per-Weight Flexible Perovskite Solar Cell Mini-modules

Revealing Defect Passivation and Charge Extraction by Ultrafast Spectroscopy in Perovskite Solar Cells through a Multifunctional Lewis Base Additive Approach

Contact Info

Product

Resources

About

Enhancing the Efficiency and Stability of Perovskite Solar Cells through Defect Passivation and Controlled Crystal Growth Using Allantoin

Cited by 4 publications

References 78 publications

Inkjet-printed SnO x as an effective electron transport layer for planar perovskite solar cells and the effect of Cu doping

Inkjet-printed SnO x as an effective electron transport layer for planar perovskite solar cells and the effect of Cu doping

One-Stone-for-Two-Birds Method to Improve the SnO2 Layers for High Power-per-Weight Flexible Perovskite Solar Cell Mini-modules

Revealing Defect Passivation and Charge Extraction by Ultrafast Spectroscopy in Perovskite Solar Cells through a Multifunctional Lewis Base Additive Approach

Contact Info

Product

Resources

About

Inkjet-printed SnO _x as an effective electron transport layer for planar perovskite solar cells and the effect of Cu doping

Inkjet-printed SnO _x as an effective electron transport layer for planar perovskite solar cells and the effect of Cu doping

One-Stone-for-Two-Birds Method to Improve the SnO₂ Layers for High Power-per-Weight Flexible Perovskite Solar Cell Mini-modules