Ionic Bilateral Passivator Carboxyethylisothiuronium Chloride for CsPbI3-xBrx Perovskite Solar Cells with PCE 20.9% and Superior Stability

Huang, Jin; Wang, Hao; Chen, Chunyang; Tang, Yizhe; Yang, Hoon Shik; Zhang, Dan; Liu, Shengzhong

doi:10.1016/j.mattod.2023.05.008

Cited by 14 publications

(5 citation statements)

References 56 publications

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“…Furthermore, the enhancement of the built-in potential suggests a suppression of nonradiative recombination processes, which further enhances the overall efficiency by reducing energy losses associated with charge carriers. 43 This was further confirmed by the interfacial charge density (N) obtained from the slope of MS plots. The control devices have an N value of 1.08 × 10 16 cm −3 which gets suppressed to 0.90 × 10 16 cm −3 for MDA-modified devices; this indicates the reduction in charge accumulation and better charge transport from the active layer to transport layer.…”

Section: Acs Applied Energy Materialsmentioning

confidence: 64%

“…The increased built-in potential contributes to the observed improvement in the V OC of the modified device. Furthermore, the enhancement of the built-in potential suggests a suppression of nonradiative recombination processes, which further enhances the overall efficiency by reducing energy losses associated with charge carriers . This was further confirmed by the interfacial charge density ( N ) obtained from the slope of MS plots.…”

Section: Results and Discussionmentioning

confidence: 95%

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Hot Carrier Cooling Mediated Efficiency Enhancement in Diamine Passivated Perovskite Solar Cells

Choudhary,

Garai,

Gupta

et al. 2024

ACS Appl. Energy Mater.

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Slowing hot carrier (HC) cooling in halide perovskites emerges as an efficient strategy to enhance the power conversion efficiency (PCE) of perovskite solar cells (PSCs). This approach facilitates the rapid extraction of HCs before they dissipate within the intricate lattice of the perovskite structure. In this investigation, we delve into the impact of amine-based additives on the relaxation of HCs in perovskite solar cells using a diamine 4,4′-diaminodiphenylmethaneiodide salt (MDA). The diamine has been used as an in situ additive in the perovskite precursor. The ultrafast femtosecond transient absorption (fs-TA) spectroscopy study confirms that the diamine-modified film slows the HC cooling time to 672 fs from the control (538 fs). Moreover, MDA additive helps to improve crystallization and passivate the traps for inhibiting nonradiative recombination, leading to higher PCE compared to the control device. The passivated devices show impressive ambient stability and retain 80% of initial PCE after 500 h. Our study provides an in-depth understanding of how precise control of HC cooling through additive engineering can improve the PSC's efficiency and stability.

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Section: Acs Applied Energy Materialsmentioning

confidence: 64%

Section: Results and Discussionmentioning

confidence: 95%

Hot Carrier Cooling Mediated Efficiency Enhancement in Diamine Passivated Perovskite Solar Cells

Choudhary,

Garai,

Gupta

et al. 2024

ACS Appl. Energy Mater.

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“…Finally, in February 2023, a record efficiency of 21.15% was reported after the incorporation of an acyloin ligand (1,2di(thiophen-2-yl)ethane-1,2-dione) into a γ-CsPbI 3 thin film 127 . Afterward, efficiencies of 20.26% and 20.9% were reported in April and May, respectively, after the introduction of 4-thioureidobenzoic acid (4-TBA) (into γ-CsPbI 3 ) 128 and carboxyethylisothiuronium chloride (ATP) (into γ-CsPbI 2.85 Br 0.15 ) 129 . In recent years, work has also been done on improving the conversion efficiencies of CsPbI 3 QDs/nanocrystals with surface passivators, Fig.…”

Section: Relationship Between Phase Stabilization and Defect Passivationmentioning

confidence: 99%

Phase stabilization of cesium lead iodide perovskites for use in efficient optoelectronic devices

Jin,

Zeng,

Steele

et al. 2024

NPG Asia Mater

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All-inorganic lead halide perovskites (LHPs) and their use in optoelectronic devices have been widely explored because they are more thermally stable than their hybrid organic‒inorganic counterparts. However, the active perovskite phases of some inorganic LHPs are metastable at room temperature due to the critical structural tolerance factor. For example, black phase CsPbI3 is easily transformed back to the nonperovskite yellow phase at ambient temperature. Much attention has been paid to improving the phase stabilities of inorganic LHPs, especially those with high solar cell efficiencies. Herein, we discussed the origin of phase stability for CsPbI3 and the strategies used to stabilize the cubic (α) phase. We also assessed the CsPbI3 black β/γ phases that are relatively stable at nearly room temperature. Furthermore, we determined the relationship between phase stabilization and defect passivation and reviewed the growing trend in solar cell efficiency based on black phase CsPbI3. Finally, we provide perspectives for future research related to the quest for optimum device efficiency and green energy.

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“…All-inorganic cesium lead halide (CsPbX 3 , X = I, Br) perovskites have attracted much attention because of their superior thermal stability over their organic–inorganic hybrid counterparts, according to both experimental and theoretical results. − Among the CsPbX 3 perovskite materials, the mixed halide CsPbI 2 Br is considered the most promising light absorber due to the trade-off between stability and efficiency. CsPbI 2 Br has excellent thermal/light soaking stability and a suitable band gap of ≈1.90 eV, which exhibits promising application potential in the front cell of tandem solar cells. , In recent years, the performance of CsPbI 2 Br perovskite solar cells (PSCs) has been rapidly improved through some innovations, such as modulating the crystallization process, optimizing composition, , and modifying the interface. , Yang et al reported a low-dimensional intermediate-assisted growth (LDIAG) method to control both nucleation and growth kinetics by introducing imidazole halide (IMX: IMI and IMBr) into the precursor solution .…”

Section: Introductionmentioning

confidence: 99%

Enhanced Efficiency and Stability of Inverted CsPbI₂Br Perovskite Solar Cells via Fluorinated Organic Ammonium Salt Surface Passivation

Cao,

Wang,

She

et al. 2024

Langmuir

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All-inorganic perovskite solar cells (PSCs) have recently received increasing attention due to their outstanding thermal stability. However, the performance of these devices, especially for the devices with a p−i−n structure, is still inferior to that of the typical organic− inorganic counterparts. In this study, we introduce phenylammonium iodides with different side groups on the surface of the CsPbI 2 Br perovskite film and investigate their passivation effects. Our studies indicate that the 4-trifluoromethyl phenylammonium iodide (CFPA) molecule with the −CF 3 side group effectively decreases the trap density of the perovskite film by forming interactions with the undercoordinated Pb 2+ ions and significantly inhibits the nonradiative recombination in the derived PSC, leading to an enhanced open-circuit voltage (V oc ) from 0.96 to 1.10 V after passivation. Also, the CFPA post-treatment enables better energy-level alignment between the conduction band minimum of CsPbI 2 Br perovskite and [6,6]-phenyl C61 butyric acid methyl ester, thereby enhancing the charge extraction from the perovskite to the charge transport layer. These combined benefits result in a significant enhancement of the power conversion efficiency from 11.22 to 14.37% for inverted CsPbI 2 Br PSCs. The device without encapsulation exhibits a degradation of only ≈4% after 1992 h in a N 2 glovebox.

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Ionic Bilateral Passivator Carboxyethylisothiuronium Chloride for CsPbI3-xBrx Perovskite Solar Cells with PCE 20.9% and Superior Stability

Cited by 14 publications

References 56 publications

Hot Carrier Cooling Mediated Efficiency Enhancement in Diamine Passivated Perovskite Solar Cells

Hot Carrier Cooling Mediated Efficiency Enhancement in Diamine Passivated Perovskite Solar Cells

Phase stabilization of cesium lead iodide perovskites for use in efficient optoelectronic devices

Enhanced Efficiency and Stability of Inverted CsPbI₂Br Perovskite Solar Cells via Fluorinated Organic Ammonium Salt Surface Passivation

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Ionic Bilateral Passivator Carboxyethylisothiuronium Chloride for CsPbI3-xBrx Perovskite Solar Cells with PCE 20.9% and Superior Stability

Cited by 14 publications

References 56 publications

Hot Carrier Cooling Mediated Efficiency Enhancement in Diamine Passivated Perovskite Solar Cells

Hot Carrier Cooling Mediated Efficiency Enhancement in Diamine Passivated Perovskite Solar Cells

Phase stabilization of cesium lead iodide perovskites for use in efficient optoelectronic devices

Enhanced Efficiency and Stability of Inverted CsPbI2Br Perovskite Solar Cells via Fluorinated Organic Ammonium Salt Surface Passivation

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Enhanced Efficiency and Stability of Inverted CsPbI₂Br Perovskite Solar Cells via Fluorinated Organic Ammonium Salt Surface Passivation