Highly efficient CsPbI3/Cs1-xDMAxPbI3 bulk heterojunction perovskite solar cell

Sun, Xiuhong; Shao, Zhipeng; Li, Zhipeng; Liu, Dachang; Chien, Gao; Chen, Chen; Zhang, Bingqian; Hao, Lianzheng; Zhao, Qiangqiang; Li, Yimeng; Wang, Xianzhao; Lu, Yue; Cui, Guanglei; Pang, Shuping

doi:10.1016/j.joule.2022.02.004

Cited by 75 publications

(68 citation statements)

References 43 publications

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“…As illuminated in Figure 1b, the p‐type surface with deep‐energy‐level traps would result in an uneven energy band bending at the PCBM/CsPbI 3 interface, resulting in the hindered transfer of electrons and serious nonradiative recombination. [ 5,33 ] The undesirable electron‐transfer dynamics would limit the efficiency improvement of inverted CsPbI 3 PSCs with low V oc and FF. Additionally, we studied the theoretical photovoltaic performance of the inverted CsPbI 3 PSCs with various p‐type traps and different density ( N it ) on the CsPbI 3 surface based on the photoelectric model simulations.…”

Section: Resultsmentioning

confidence: 99%

Polishing the Lead‐Poor Surface for Efficient Inverted CsPbI₃ Perovskite Solar Cells

Guo

et al. 2022

Advanced Materials

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Triiodide cesium lead perovskite (CsPbI3) has promising prospects in the development of efficient and stable photovoltaics in both single‐junction and tandem structures. However, achieving inverted devices that provide good stability and are compatible to tandem devices remains a challenge, and the deep insights are still not understood. This study finds that the surface components of CsPbI3 are intrinsically lead‐poor and the relevant traps are of p‐type with localized states. These deep‐energy‐level p traps induce inferior transfer or electrons and serious nonradiative recombination at the CsPbI3/PCBM interface, leading to the considerable open‐circuit voltage (Voc) loss and reduction of fill factor (FF). Compared to molecular passivation, polishing treatment with 1,4‐butanediamine can eliminate the nonstoichiometric components and root these intrinsically lead‐poor traps for superior electron transfer. The polishing treatment significantly improves the FF and Voc of the inverted CsPbI3 photovoltaics, creating an efficiency promotion from 12.64% to 19.84%. Moreover, 95% of the initial efficiency of the optimized devices is maintained after the output operation for 1000 h.

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Section: Resultsmentioning

confidence: 99%

Polishing the Lead‐Poor Surface for Efficient Inverted CsPbI₃ Perovskite Solar Cells

Guo

et al. 2022

Advanced Materials

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Section: Morphologies and Structures Of Pt–co Electrocatalystsmentioning

confidence: 99%

Section: Morphologies and Structures Of Pt–co Electrocatalystsmentioning

confidence: 99%

“…In recent years, the unique heterojunction structure has facilitated rapid development in the fields of photovoltaics, photocatalysis, and electrocatalysis. [ 18,63 ] A reasonable design of a heterojunction catalyst with an ideal heterojunction interface can overcome the shortcomings of a single component and attain superior electrocatalysis performance. Combining the advantages of a Pt‐based bimetallic alloy and heterojunction, Chen et al.…”

Section: Morphologies and Structures Of Pt–co Electrocatalystsmentioning

confidence: 99%

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Pt–Co Electrocatalysts: Syntheses, Morphologies, and Applications

Chen

Liu

et al. 2022

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Pt–Co electrocatalysts have attracted significant attention because of their excellent performance in many electrochemical reactions. This review focuses on Pt–Co electrocatalysts designed and prepared for electrocatalytic applications. First, the various synthetic methods and synthesis mechanisms are systematically summarized; typical examples and core synthesis parameters are discussed for regulating the morphology and structure. Then, starting with the design and structure–activity relationship of catalysts, the research progress of the morphologies and structures of Pt–Co electrocatalysts obtained based on various strategies, the structure–activity relationship between them, and their properties are summarized. In addition, the important electrocatalytic applications and mechanisms of Pt–Co catalysts, including electrocatalytic oxidation/reduction and bifunctional catalytic reactions, are described and summarized, and their high catalytic activities are discussed on the basis of their mechanism and active sites. Moreover, the advanced electrochemical in situ characterization techniques are summarized, and the challenges and direction concerning the development of high‐performance Pt–Co catalysts in electrocatalysis are discussed.

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“…[ 1 ] Since its inception in 2009, researchers have made continuous improvements in composition engineering, perovskite‐transport layer interface engineering, and solvent engineering. [ 2 , 3 , 4 ] Currently, the single‐junction PSCs have been reported to achieve a recorded PCE of 25.8%, making perovskite solar cells a disruptive type of photovoltaic technology. [ 5 , 6 ] Because of its bandgap tunability from 1.17 eV to 3.10 eV, perovskite is also an ideal choice as both wide‐bandgap top and narrow‐bandgap bottom sub‐cells in tandem solar cells (TSCs).…”

Section: Introductionmentioning

confidence: 99%

Mixed Solvents Assisted Post‐Treatment Enables High‐Efficiency Single‐Junction Perovskite and 4T Perovskite/CIGS Tandem Solar Cells

et al. 2022

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The interface between the perovskite layer and the hole transport layer (HTL) plays a vital role in hole extraction and electron blocking in perovskite solar cells (PSCs), and it is particularly susceptible to harmful defects. Surface passivation is an effective strategy for addressing the above concerns. However, because of its strong polarity, isopropyl alcohol (IPA) is used as a solvent in all of the surface treatment materials reported thus far, and it frequently damages the surface of perovskite. In this paper, a method is proposed for dissolving the passivation materials, for example, guanidine bromide (GABr), in mixed solvents (1:1) of IPA and toluene (TL), which can efficiently passivate interface and grain boundary defects by minimizing the IPA solubility of the perovskite surface. As a result, all the performance parameters Voc, Jsc, and FF are improved, and the power conversion efficiency (PCE) increased from 20.1 to 22.7%. Moreover, combining the PSCs with GABr post‐treatment in mixed solvents with copper indium gallium selenide (CIGS) solar cells, a 4‐terminal (4T) perovskite/CIGS tandem device is realized and a PCE of 25.5% is achieved. The mixed solvent passivation strategy demonstrated here, hopefully, will open new avenues for improving PSCs’ efficiency and stability.

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Highly efficient CsPbI3/Cs1-xDMAxPbI3 bulk heterojunction perovskite solar cell

Cited by 75 publications

References 43 publications

Polishing the Lead‐Poor Surface for Efficient Inverted CsPbI₃ Perovskite Solar Cells

Polishing the Lead‐Poor Surface for Efficient Inverted CsPbI₃ Perovskite Solar Cells

Pt–Co Electrocatalysts: Syntheses, Morphologies, and Applications

Mixed Solvents Assisted Post‐Treatment Enables High‐Efficiency Single‐Junction Perovskite and 4T Perovskite/CIGS Tandem Solar Cells

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Highly efficient CsPbI3/Cs1-xDMAxPbI3 bulk heterojunction perovskite solar cell

Cited by 75 publications

References 43 publications

Polishing the Lead‐Poor Surface for Efficient Inverted CsPbI3 Perovskite Solar Cells

Polishing the Lead‐Poor Surface for Efficient Inverted CsPbI3 Perovskite Solar Cells

Pt–Co Electrocatalysts: Syntheses, Morphologies, and Applications

Mixed Solvents Assisted Post‐Treatment Enables High‐Efficiency Single‐Junction Perovskite and 4T Perovskite/CIGS Tandem Solar Cells

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Product

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Polishing the Lead‐Poor Surface for Efficient Inverted CsPbI₃ Perovskite Solar Cells

Polishing the Lead‐Poor Surface for Efficient Inverted CsPbI₃ Perovskite Solar Cells