Improved air stability of perovskite hybrid solar cells via blending poly(dimethylsiloxane)–urea copolymers

Xiang, Wanchun; Chen, Qi; Wang, Yiyuan; Liu, Meijin; Huang, Fuzhi; Bu, Tongle; Wang, Taishan; Cheng, Yi‐Bing; Gong, Xiao; Zhong, Jie; Liu, Peng; Yao, Xi; Zhao, Xiujian

doi:10.1039/c7ta00589j

Cited by 53 publications

(51 citation statements)

References 33 publications

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“…Perovskite solar cells with improved flexibility have been reported previously . It has also been reported that polymer additives can be used to stabilize perovskite crystals against humidity‐assisted degradation . In particular, polymers that can form hydrogen bonds with perovskite components (organic cations) are considered to be effective additives.…”

Section: Resultsmentioning

confidence: 99%

Humidity‐Tolerant Roll‐to‐Roll Fabrication of Perovskite Solar Cells via Polymer‐Additive‐Assisted Hot Slot Die Deposition

Kim

Zuo

et al. 2019

Adv Funct Materials

114

113

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Heating-assisted deposition is an industry-friendly scalable deposition method. This manufacturing method is employed together with slot die coating to fabricate perovskite solar cells via a roll-to-roll process. The feasibility of the method is demonstrated after initial testing on a rigid substrate using a benchtop slot die coater in air. The fabricated solar cells exhibit power conversion efficiencies (PCEs) up to 14.7%. A nonelectroactive polymer additive is used with the perovskite formulation and found to improve its humidity tolerance significantly. These deposition parameters are also used in the roll-to-roll setup. The perovskite layer and other solution-processed layers are slot die-coated, and the fabricated device shows PCEs up to 11.7%, which is the highest efficiency obtained from a fully roll-to-roll processed perovskite solar cell to date.

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Section: Resultsmentioning

confidence: 99%

Humidity‐Tolerant Roll‐to‐Roll Fabrication of Perovskite Solar Cells via Polymer‐Additive‐Assisted Hot Slot Die Deposition

Kim

Zuo

et al. 2019

Adv Funct Materials

114

113

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“…Then the PbI 2 film was soaked in the MAI or MAI/urea solvent for several hours. MAI tends to react first at the defects and grain boundaries of PbI 2 film, and the reaction between them is very fast. In the two‐step method, the role of urea is firstly to form an adduct to slow down the formation of perovskite layers, thereby promoting the penetration of MAI solution in the PbI 2 film, and then delay the growth of grains and improve the film quality.…”

Section: Resultsmentioning

confidence: 99%

Improved Performance of Carbon Electrode Perovskite Solar Cells Using Urea Treatment in Two‐Step Processing

Sun

Cao

et al. 2020

ChemNanoMat

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Perovskite solar cell has made a steady research progress with superior photovoltaic power conversion efficiency (PCE) over 25%. The quality of perovskite film is a key factor affecting device efficiency. Lewis bases such as urea, DMSO and thiourea etc. have been applied in perovskite precursor solutions for one step processing to effectively control the film morphology. Herein, we report urea treatment in a two-step processing for obtaining high quality methylammonium lead triiodide perovskite (CH 3 NH 3 PbI 3 ) film, which is accomplished by immersing the PbI 2 film into the mixture solution of urea/methylammonium iodide (MAI). The optimized urea concentration in the MAI solution is 0.4 mg/ mL, leading to larger-sized and better crystalline perovskite grains than that without urea additive. The main function of the urea additive is the formation of the adduct MAI·PbI 2 ·O=C (NH 2 ) 2 , retarding the crystallization process of the perovskite film. The steady-state and time-resolved photoluminescence measurements revealed that perovskite CH 3 NH 3 PbI 3 grown using optimized concentration of urea has prolonged carrier lifetime and reduced carrier recombination. Finally, the carbon-based perovskite solar cells fabricated from the optimal urea concentration of 0.4 mg/mL achieved the enhanced photovoltaic performance with the highest PCE of 13.10% and an average value of 11.34%, in comparison to devices without urea treatment exhibiting an average PCE of only 8.67%.[a] Prof.

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“…Polymers have potential in providing optimal morphologies and strong humidity resistance to the perovskite absorber when they are used as the ETL scaffold. However, the mesoporous polymer scaffolds often suffer as a result of their insulating character or poor conductivity limits, so they are usually used as templates but not ETLs in PSCs . In order to improve the electron transport, Tong et al reported a low‐temperature‐processed mesoporous graphene/polymer (mp‐GP)/Cs 2 CO 3 ETL for high‐performance PSCs .…”

Section: Mesoscopic Etl In Regular (N–i–p) Pscsmentioning

confidence: 99%

Electron‐Transport Materials in Perovskite Solar Cells

et al. 2018

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Perovskite solar cells (PSCs) based on organic–inorganic hybrid materials are a rising technology offering an alternative to silicon‐based solar cells. Electron‐transport materials (ETMs) are important for PSCs and have received much attention. Here, first, the development of the structure of PSCs, from which the ETM requirements would be derived, is briefly discussed. Second, the progress of ETMs in mesoscopic PSCs, as well as regular (n–i–p) and inverted (p–i–n) planar PSCs is surveyed and analyzed, in terms of the material requirements, inorganic ETMs, organic ETMs, and interfacial materials. Third, the advancement of PSCs without ETMs is discussed. Finally, a summary and outlook on the current challenges and future development of ETMs in PSCs is given.

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Improved air stability of perovskite hybrid solar cells via blending poly(dimethylsiloxane)–urea copolymers

Abstract: A hydroscopic and flexible copolymer has been successfully employed in the fabrication of perovskite solar cells with high photovoltaic performance and enhanced stability.

Cited by 53 publications

References 33 publications

Humidity‐Tolerant Roll‐to‐Roll Fabrication of Perovskite Solar Cells via Polymer‐Additive‐Assisted Hot Slot Die Deposition

Humidity‐Tolerant Roll‐to‐Roll Fabrication of Perovskite Solar Cells via Polymer‐Additive‐Assisted Hot Slot Die Deposition

Improved Performance of Carbon Electrode Perovskite Solar Cells Using Urea Treatment in Two‐Step Processing

Electron‐Transport Materials in Perovskite Solar Cells

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