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1

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Fabrication and Characterization of FA x Cs 1− x PbI 3 Polycrystal Perovskite Solar Cells

Gao, Caiyun ; Shao, Zhipeng ; Sun, Xiuhong ; [et al.]

Wiley ; 2021

In: Solar RRL Vol. 5, No. 7 ( 2021-07)

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In: Solar RRL, Wiley, Vol. 5, No. 7 ( 2021-07)

Abstract: FA x Cs 1− x PbI 3 perovskites were considered promising candidates to accomplish the goals of high photoelectric conversion efficiency with great stability. Limited by the phase separation during fabrication through the conventional one‐step method, the FA x Cs 1− x PbI 3 perovskites with the x ratio lower than 0.7 were barely studied. Herein, the full‐scale mixed cation‐doped FA x Cs 1− x PbI 3 perovskites are synthesized and studied. The bandgap of FA x Cs 1− x PbI 3 perovskites gradually decreases from 1.69 to 1.58 eV with x increasing from 0.15 to 0.75, along with phase structure changes from tetragonal (β) to cubic (α). Under humidity or UV irradiation, the FA x Cs 1− x PbI 3 perovskites phase separates to FA 0.92 Cs 0.08 PbI 3 perovskite and δ‐CsPbI 3 . The FA 0.60 Cs 0.40 PbI 3 perovskite solar cells exhibit more stable efficiency, the champion device reaches a power conversion efficiency of 20.40%. Meanwhile, the unencapsulated devices keep 90% of the initial efficiency when stored in air for 30 days, showing the potential for high stability photovoltaic devices.

Type of Medium: Online Resource

ISSN: 2367-198X , 2367-198X

URL: Issue

URL: Article

DOI: 10.1002/solr.v5.7

DOI: 10.1002/solr.202100166

Language: English

Publisher: Wiley

Publication Date: 2021

detail.hit.zdb_id: 2882014-9

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2

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Synthesis of Cs-rich CH(NH〈sub〉2〈/sub〉)〈sub〉2〈/sub〉)〈sub〉〈i〉X〈/i〉〈/sub〉Cs〈sub〉1-〈i〉X〈/i〉〈/sub〉PbI〈sub〉3〈/sub〉 Perovskite Films Using Additives with Low Sublimation Temperature

Lü, Peiliang ; Gao, Caiyun ; Sun, Xiuhong ; [et al.]

Acta Physico-Chimica Sinica & University Chemistry Editorial Office, Peking University ; 2020

In: Acta Physico Chimica Sinica Vol. 0, No. 0 ( 2020), p. 2009036-0

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In: Acta Physico Chimica Sinica, Acta Physico-Chimica Sinica & University Chemistry Editorial Office, Peking University, Vol. 0, No. 0 ( 2020), p. 2009036-0

Type of Medium: Online Resource

ISSN: 1000-6818

URL: Article

DOI: 10.3866/PKU.WHXB202009036

Language: English

Publisher: Acta Physico-Chimica Sinica & University Chemistry Editorial Office, Peking University

Publication Date: 2020

detail.hit.zdb_id: 2474339-2

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3

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Enhance Photothermal Stability of Hybrid Perovskite Materials by Inhibiting Intrinsic Ion Migration

Liu, Dachang ; Zhao, Qiangqiang ; Li, Zhipeng ; [et al.]

Wiley ; 2022

In: Solar RRL Vol. 6, No. 9 ( 2022-09)

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In: Solar RRL, Wiley, Vol. 6, No. 9 ( 2022-09)

Abstract: The degradation of the perovskite solar cells (PSCs) is closely related to phase decomposition, phase separation, and structural collapse, which mainly originates from the intrinsic ion migration under light soaking and thermal stress. Herein, the composition of perovskite materials is regulated based on its ion migration characteristics. By systematically studying the effect of A‐site cations on the ion migration and photothermal stability of organic–inorganic hybrid perovskite materials, it is found that the codoping of appropriate methylammonium (MA) and Cs cation in the formamidinium (FA)‐rich perovskite is favorable for the highly efficient and stable PSCs. The optimized triple‐cation FA 0.90 Cs 0.04 MA 0.06 PbI 3 exhibits significantly improved photothermal stability in comparison with the double‐cation and Br‐containing perovskite materials. Moreover, the optimized triple‐cation device demonstrates excellent operation stability at maximum power tracking, and maintains 87% of initial efficiency after 1800 h.

Type of Medium: Online Resource

ISSN: 2367-198X , 2367-198X

URL: Issue

URL: Article

DOI: 10.1002/solr.v6.9

DOI: 10.1002/solr.202200414

Language: English

Publisher: Wiley

Publication Date: 2022

detail.hit.zdb_id: 2882014-9

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4

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Cs 4 PbI 6 ‐Mediated Synthesis of Thermodynamically Stable FA 0.15 Cs 0.85 PbI 3 Perovskite Solar Cells

Shao, Zhipeng ; Meng, Hongguang ; Du, Xiaofan ; [et al.]

Wiley ; 2020

In: Advanced Materials Vol. 32, No. 30 ( 2020-07)

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In: Advanced Materials, Wiley, Vol. 32, No. 30 ( 2020-07)

Abstract: The stability issue is still one of the main limitations of the commercialization of perovskite photovoltaics. The mixed cation FA x Cs 1 −x PbI 3 has shown great promise owing to its improved thermal and moisture stability. However, the study of FA x Cs 1 −x PbI 3 is concentrated on formamidine (FA)‐rich perovskite, whereas cesium (Cs)‐rich FA x Cs 1 −x PbI 3 perovskites are barely studied due to the inevitable phase separation when Cs 〉 30 mol%. Here, a Cs 4 PbI 6 ‐mediated method is developed to synthesize Cs‐rich FA x Cs 1 −x PbI 3 perovskites. It is demonstrated that Cs 4 PbI 6 intermediate phase has a low Cs cation diffusion barrier and therefore offers a fast ion exchange with the preformed FA‐rich perovskite phase to finally form the Cs‐rich FA x Cs 1 −x PbI 3 perovskite. The results indicate that ≈15% alloying with organic FA cations can sufficiently stabilize the perovskite phase with excellent phase and UV‐irradiation stability. The FA 0.15 Cs 0.85 PbI 3 perovskite solar cells achieve a champion power conversion efficiency of 17.5%, showing the great potential of Cs‐based perovskites for efficient and stable solar cells.

Type of Medium: Online Resource

ISSN: 0935-9648 , 1521-4095

URL: Issue

URL: Article

DOI: 10.1002/adma.v32.30

DOI: 10.1002/adma.202001054

RVK:

UA 1538

Language: English

Publisher: Wiley

Publication Date: 2020

detail.hit.zdb_id: 1474949-X

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5

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Chemical Bath Deposition of Mesoporous Sno2 to Improve Interface Adhesion and Device Operational Stability

Zhao, Qiangqiang ; Liu, Dachang ; Li, Zhipeng ; [et al.]

Elsevier BV ; 2022

In: SSRN Electronic Journal

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In: SSRN Electronic Journal, Elsevier BV

Type of Medium: Online Resource

ISSN: 1556-5068

URL: Article

DOI: 10.2139/ssrn.4037945

Language: English

Publisher: Elsevier BV

Publication Date: 2022

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6

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PbI 6 Octahedra Stabilization Strategy Based on π‐π Stacking Small Molecule Toward Highly Efficient and Stable Perovskite Solar Cells

Wang, Xianzhao ; Liu, Dachang ; Liu, Ruichen ; [et al.]

Wiley ; 2023

In: Advanced Energy Materials Vol. 13, No. 11 ( 2023-03)

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In: Advanced Energy Materials, Wiley, Vol. 13, No. 11 ( 2023-03)

Abstract: The unavoidable iodine loss in the perovskite layer is closely related to carrier non‐radiative and device degradation. During the post‐annealing process, the fragile PbI bond is easy to break, leading to the formation of iodine vacancies and inducing stress‐driven structure collapse. Herein, a PbI 6 octahedra stabilization strategy via building robust grain boundary modification networks is developed. The introduction of conjugated structure into amides can significantly enhance their anchoring ability with PbI units, while the π–π stacking effect of benzamide enables a passivation network with polymer‐like effect. This is well evidenced by the excellent properties in eliminated iodine loss and stabilized perovskite lattice. Therefore, benzamide modification not only transform the perovskite films from n‐type to p‐type by suppressing the iodine vacancy‐doping effect, but also reduces defect density, ultimately bringing the perovskite layer longer carrier diffusion length and better charge injection efficiency. Finally, the benzamide modified devices realize both high power conversion efficiency of 24.78% and excellent operating stability. Of particular note, the module efficiency with 14 cm 2 active area is over 21%.

Type of Medium: Online Resource

ISSN: 1614-6832 , 1614-6840

URL: Issue

URL: Article

DOI: 10.1002/aenm.v13.11

DOI: 10.1002/aenm.202203635

Language: English

Publisher: Wiley

Publication Date: 2023

detail.hit.zdb_id: 2594556-7

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7

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V OC of Inverted Perovskite Solar Cells Based on N‐Doped PCBM Exceeds 1.2 V: Interface Energy Alignment and Synergistic Passivation

Sun, Xiuhong ; Li, Yonghai ; Liu, Dachang ; [et al.]

Wiley ; 2023

In: Advanced Energy Materials

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In: Advanced Energy Materials, Wiley

Abstract: Phenyl‐C61‐butyric acid methyl ester (PCBM) remains the most commonly used electron transport layer in inverted perovskite solar cells (IPSCs). However, its insufficient electrical properties and passivation ability limit the device's performance. In this study, it is demonstrated that introducing an appropriate amount of n‐type polymer N2200 into the PCBM can simultaneously enhance the electrical properties of PCBM and passivate the defects distributed on perovskite surface. This modification of PCBM leads to improved band alignment and enhanced electron mobility. Simultaneously, N2200 polymer contains electron donors such as O, S involved in passivating uncoordinated Pb 2+ defects. The PCBM@N2200‐based IPSCs exhibit an enhanced open‐circuit voltage ( V OC ) of 1.20 V with the minimum 0.36 V voltage loss and reach the champion power conversion efficiency (PCE) of 24.53% (certified PCE is 24.05%) with narrow distribution. Impressively, the corresponding module achieves an efficiency of 20.30% (11.19 cm 2 ). Moreover, the PCBM@N2200‐based IPSCs maintain 96% of their initial efficiency after operating at the maximum power point for 500 h, thanks to the interfacial passivation, improved uniformity, and increased hydrophobicity resulting from N2200 doping.

Type of Medium: Online Resource

ISSN: 1614-6832 , 1614-6840

URL: Article

DOI: 10.1002/aenm.202302191

Language: English

Publisher: Wiley

Publication Date: 2023

detail.hit.zdb_id: 2594556-7

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8

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Polyacrylonitrile‐Coordinated Perovskite Solar Cell with Open‐Circuit Voltage Exceeding 1.23 V

Chen, Chen ; Wang, Xiao ; Li, Zhipeng ; [et al.]

Wiley ; 2022

In: Angewandte Chemie Vol. 134, No. 8 ( 2022-02-14)

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In: Angewandte Chemie, Wiley, Vol. 134, No. 8 ( 2022-02-14)

Abstract: In solution‐processed organic–inorganic halide perovskite films, halide‐anion related defects including halide vacancies and interstitial defects can easily form at the surfaces and grain boundaries. The uncoordinated lead cations produce defect levels within the band gap, and the excess iodides disturb the interfacial carrier transport. Thus these defects lead to severe nonradiative recombination, hysteresis, and large energy loss in the device. Herein, polyacrylonitrile (PAN) was introduced to passivate the uncoordinated lead cations in the perovskite films. The coordinating ability of cyano group was found to be stronger than that of the normally used carbonyl groups, and the strong coordination could reduce the I/Pb ratio at the film surface. With the PAN perovskite film, the device efficiency improved from 21.58 % to 23.71 % and the open‐circuit voltage from 1.12 V to 1.23 V, the ion migration activation energy increased, and operational stability improved.

Type of Medium: Online Resource

ISSN: 0044-8249 , 1521-3757

URL: Issue

URL: Article

DOI: 10.1002/ange.v134.8

DOI: 10.1002/ange.202113932

RVK:

VA 2100

RVK:

VN 5020

Language: English

Publisher: Wiley

Publication Date: 2022

detail.hit.zdb_id: 505868-5

detail.hit.zdb_id: 506609-8

detail.hit.zdb_id: 514305-6

detail.hit.zdb_id: 505872-7

detail.hit.zdb_id: 1479266-7

detail.hit.zdb_id: 505867-3

detail.hit.zdb_id: 506259-7

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9

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Chemical bath deposition of mesoporous SnO2 to improve interface adhesion and device operational stability

Zhao, Qiangqiang ; Liu, Dachang ; Li, Zhipeng ; [et al.]

Elsevier BV ; 2022

In: Chemical Engineering Journal Vol. 443 ( 2022-09), p. 136308-

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In: Chemical Engineering Journal, Elsevier BV, Vol. 443 ( 2022-09), p. 136308-

Type of Medium: Online Resource

ISSN: 1385-8947

URL: Article

DOI: 10.1016/j.cej.2022.136308

Language: English

Publisher: Elsevier BV

Publication Date: 2022

detail.hit.zdb_id: 241367-X

detail.hit.zdb_id: 2012137-4

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10

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A Multifunctional Polymer as an Interfacial Layer for Efficient and Stable Perovskite Solar Cells

Zhang, Bingqian ; Chen, Chen ; Wang, Xianzhao ; [et al.]

Wiley ; 2023

In: Angewandte Chemie Vol. 135, No. 2 ( 2023-01-09)

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In: Angewandte Chemie, Wiley, Vol. 135, No. 2 ( 2023-01-09)

Abstract: Metal‐cation defects and halogen‐anion defects in perovskite films are critical to the efficiency and stability of perovskite solar cells (PSCs). In this work, a random polymer, poly(methyl methacrylate‐ co ‐acrylamide) (PMMA‐AM), was synthesized to serve as an interfacial passivation layer for synergistically passivating the under‐coordinated Pb 2+ and anchor the I ‐ of the [PbI 6 ] 4− octahedron. Additionally, the interfacial PMMA‐AM passivation layer cannot be destroyed during the hole transport layer deposition because of its low solubility in chlorobenzene. This passivation leads to an enhancement in the open‐circuit voltage from 1.12 to 1.22 V and improved stability in solar cell devices, with the device maintaining 95 % of the initial power conversion efficiency (PCE) over 1000 h of maximum power point tracking. Additionally, a large‐area solar cell module was fabricated using this approach, achieving a PCE of 20.64 %.

Type of Medium: Online Resource

ISSN: 0044-8249 , 1521-3757

URL: Issue

URL: Article

DOI: 10.1002/ange.v135.2

DOI: 10.1002/ange.202213478

RVK:

VA 2100

RVK:

VN 5020

Language: English

Publisher: Wiley

Publication Date: 2023

detail.hit.zdb_id: 505868-5

detail.hit.zdb_id: 506609-8

detail.hit.zdb_id: 514305-6

detail.hit.zdb_id: 505872-7

detail.hit.zdb_id: 1479266-7

detail.hit.zdb_id: 505867-3

detail.hit.zdb_id: 506259-7

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