CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zidan Liu,Feng Liu,Chenghao Duan,Ligang Yuan,Hepeng Zhu,Jiong Li,Qiaoyun Wen,Geoffrey I.N. Waterhouse,Xianfeng Yang,Keyou Yan
The black perovskite ( α -FAPbI 3 ) tends to spontaneously transform into the yellow non -perovskite ( δ -FAPbI 3 ) under ambient conditions, which degrades the performance and stability of FAPbI 3 -based perovskite solar cells (PSCs). Herein, we applied an in-situ polymerization controlled growth (IPCG) strategy for crystal grain to suppress the α-to-δ phase conversion. Polymerization of 2-(Dimethylamino) ethyl methacrylate (DMAEMA) contained in the antisolvent created polymers (denoted as Poly(D)) which acted to simultaneously increase the perovskite grain size, passivate defects, stabilize the black phase, and block moisture penetration, thus greatly improving photovoltaic performance and stability. The resulting FAPbI 3 -based PSC (FTO/SnO 2 /Perovskite/Spiro-OMeTAD/Au) delivered a high power conversion efficiency (PCE) of ~ 21% (cf. ~ 16.0% PCE for the pristine FAPbI 3 device). Further, the polymerization strategy delivers PSCs with remarkable stability, with 100% of the initial PCE performance being retained over 104 days under ambient conditions (room temperature, RH = 50 ± 5%) without encapsulation of the device.
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DOI
高影响因子
Small
·
2025
·
IF 12.1
Meidan Que,Shenghui He,Yutian Li,Yuan Xu,Bo Li,Jian Wei,Lili Gao,Wei Huang,Shengzhong Liu
Organic–inorganic formamidinium lead triiodide (FAPbI 3 ) hybrid perovskite quantum dots (QDs) have garnered considerable attention in the photovoltaic field due to their narrow bandgap, exceptional environmental stability, and prolonged carrier lifetime. Unfortunately, their insulating ligands and surface vacancy defects pose significant obstacles to efficient charge transfer across device interfaces. In this work, an electrostatic harmonization strategy at the interface using a donor-acceptor dipole molecular attachment to achieve enhanced charge separation capabilities on the QD surface is ventured. On the basis of theoretical study and experimental evaluation, it has gained a comprehensive understanding of dipole-induced electronic restructuring at the quantum dot interfaces. It reveals that 3-fluoro-4-iodopyridine as a dipole source with appropriate energy levels and a high dipole moment effectively fills surface iodine vacancies (V I- ), leading to rapid separation of photoexcited charge carriers. Particularly enhanced hole mobility and hydrophobicity are achieved through strong electronegative effects of fluorine and iodine. Consequently, the FAPbI 3 QD solar cells achieve a power conversion efficiency as high as 14.11% with exceptional long-term stability in ambient. These perceptions provide effective interface engineering means for the hybrid perovskite QDs to advance their potential in high-performance optoelectronic applications.
研究领域:
材料科学
·
光电化学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Meidan Que,Hao Yuan,Qizhao Wu,Shenghui He,Peng Zhong,Bo Li
Formamidinium lead triiodide (FAPbI3) perovskite quantum dot has outstanding durability, reasonable carrier lifetime, and long carrier diffusion length for a new generation of highly efficient solar cells. However, ligand engineering is a dilemma because of the highly ionized and dynamic characteristics of quantum dots. To circumvent this issue, herein, we employed a mild solution-phase ligand-exchange approach through adding short-chain amino acids that contain amino and carboxyl groups to modify quantum dots and passivate their surface defects during the purification process. As a result, the photoelectric conversion efficiency of FAPbI3 perovskite quantum dot solar cells (PQDSCs) increased from 11.23 to 12.97% with an open-circuit voltage of 1.09 V, a short-circuit current density of 16.37 mA cm–2, and a filling factor of 72.13%. Furthermore, the stability of the device modified by amino acids retains over 80% of the initial efficiency upon being exposed to 20–30% relative humidity for 240 h of aging treatment. This work may offer an innovative concept and approach for surface ligand treatment to improve the photovoltaic performance of PQDSCs toward large-scale manufacture.
研究领域:
材料科学
·
纳米技术
·
太阳能
·
光伏技术
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DOI
高影响因子
Small
·
2023
·Vol. 19
·期 19
·2207520
·
IF 13.3
Jianan Chen,Zhaobing Tang,Yangzhou Zhou,Shuo Ding,Liang Li,Lei Qian,Chaoyu Xiang
Formamidine lead iodide (FAPbI 3 ) is an important material for realizing high-performance near-infrared light-emitting diodes (NIR-LEDs). However, due to the uncontrollable growth of solution-processed films which usually causes low coverage, and poor surface morphology, the development of FAPbI 3 -based NIR-LEDs is hindered, restraining its potential industrial applications. In this work, by employing glutamine (Gln) in perovskite precursor, the quality of FAPbI 3 film is improved significantly. Due to the ameliorated solution process by the organic additive, the film coverage over the substrate is substantially enhanced. Meanwhile, the trap state of grain is largely reduced. Consequently, NIR perovskite LEDs are demonstrated with a maximum external quantum efficiency (EQE) of 15% with the emission peak at 795 nm, which is four times higher than the device with pristine perovskite film.
研究领域:
材料科学
·
光电学
·
化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Song Zhang,Yucong Zhou,Zhitao Shen,Yingying Li,Jian Song,Yicong Gao,Zezhi Wang,Bohao Zhang,Chong Chen,Rong Liu,Ying Liu,Ruirui Cao,Huilin Li,Fumin Li
The long-term stability of perovskite films remains a critical challenge hindering the commercialization of perovskite solar cells (PSCs). Crystal facet engineering has emerged as one of the most promising strategies to enhance film stability. Herein, we introduce a series of bidentate nitrogen-based chelating ligands to precisely regulate the growth of perovskite films. Density functional theory calculations reveal that these ligands interact with lead ions in lead iodide, guiding perovskite crystal growth along the [111] orientation, which has been proven to possess excellent environmental stability. Furthermore, these interactions facilitate efficient charge transfer. X-ray diffraction results confirm that the chelating ligands promote preferential crystallization along the [111] direction. Long-term structural monitoring demonstrates that [111]-oriented films exhibit superior stability under ambient conditions. As a proof of concept, 3,4,7,8-tetramethyl-1,10-phenanthroline, a bidentate nitrogen-based ligand, was employed in formamidinium-lead-iodide-based PSCs, achieving a remarkable power conversion efficiency of 22.02% with exceptional operational stability. Detailed optoelectronic analyses further validated the reliability of this approach. These findings provide a mechanistic understanding of how chelating ligands stabilize perovskite films and present a viable strategy to enhance PSC performance, thus advancing their practical application in next-generation photovoltaic technologies.
研究领域:
材料科学
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光伏技术
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化学工程
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产品关联
DOI
高影响因子
Advanced Science
·
2022
·Vol. 9
·期 34
·2204386
·
IF 17.521
Meng Wang,Fengren Cao,Linxing Meng,Min Wang,Liang Li
Perovskite is an attractive building block for future optoelectronic applications. However, the strict fabrication conditions of perovskite devices impede the transformation of lab techniques into commercial applications. Here, a facile annealing-free posttreatment is proposed to reconstruct the perovskite film to obtain high-performance photodetectors with an optimized production rate. With posttreatment by methylamine thiocyanate, the prefabricated formamidinium-lead triiodide (FAPbI 3 ) film will undergo a recrystallization process consisting of a repeating phase-transition-cycle (PTC) between the black and yellow phases of FAPbI 3 , which improves the crystal quality and eliminates defects. As a result, some casually prepared or even decomposed perovskite films can be reconstructed, and the dispersion degree of the device performance based on the posttreatment method decreases by ≈21% compared to the traditional antisolvent method. This facile and annealing-free posttreatment will be an attractive method for the future industrial production of perovskite devices.
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yange Li,Zhenlong Zhang,Huafang Zhang,Yuefeng Liu,Huiping Gao,Yanli Mao
Most of the reported perovskite solar cells (PSCs) with high efficiency are based on the (100) facet-dominated FAPbI3 perovskite films due to their easy formation. Recent reports demonstrate that the (111) facet is more stable and more invulnerable to cationic migration than the (100) one. However, the fabrication of (111) facet-dominated perovskite is challenging. Herein, we prepared the (111) facet-dominated perovskite films by a two-step method. In the first step, an additive of 6,6′-dimethyl-2,2′-bipyridyl (DMBP) was added to the PbI2 solution, which interacts with PbI2 by a chemical bonding between Pb+ and N– in its pyridine rings, regulating the microstructure of the PbI2 film. The experimental results demonstrate that the obtained perovskite film is (111) facet-dominated. Moreover, the DMBP additive reduces the number of defects and improves the energy band structure of the perovskite. The devices based on the (111) facet-dominated perovskite achieve a high efficiency of 24.11%, which is larger than that of the control (22.55%). In addition, the stability of the devices is enhanced by the DMBP additive.
研究领域:
材料科学
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纳米技术
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光伏技术
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化学工程
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Meidan Que,Qizhao Wu,Yutian Li,Hao Yuan,Peng Zhong,Shenghui He,Yuan Xu,Bo Li,Xinyu Ma,Wenxiu Que
Formamidinium lead triiodide quantum dot (FAPbI3 QD) exhibits substantial potential in solar cells due to its suitable band gap, extended carrier lifetime, and superior phase stability. However, despite great attempts toward reconfiguring the surface chemical environment of FAPbI3 QDs, achieving the optimal efficiency of charge carrier extraction and transfer in cells remains a challenge. To circumvent this problem, we selectively introduced Au/FAPbI3 Schottky heterojunctions by reducing Au+ to Au0 and subsequently anchoring them on the surface of FAPbI3 QDs, which acts as a light-harvesting layer and establishes high-speed electron transfer channels (Au dot ↔ Au dot). As a result, the champion photoelectric conversion efficiency of solar cells reached 13.68%, a significant improvement over 11.19% of that of FAPbI3-based solar cells. The enhancement is attributed to efficient and directed electron transfer as well as a more aligned energy level arrangement. This work constructed Au/FAPbI3 QD Schottky heterojunctions, providing a viable strategy to enhance QD electron coupling for high-performance optoelectronic applications.
研究领域:
材料科学
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光伏技术
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纳米科技
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DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 11
·5874-5884
·
IF 3.361
Sheng Tang,Xinyu Xiao,Jing Hu,Bo Gao,Hunglin Chen,Zhuang Zuo,Qi Qi,Zongyang Peng,Jianchun Wen,Dechun Zou
Organic–inorganic hybrid perovskites have emerged as promising light harvesting materials for many optoelectronic devices. Here, we present a facile mechanochemical synthesis (MCS) route for the preparation of a series of pure phase mixed-cation/anion (FAPbI3)x(MAPbBr3)1−x (0 ≤ x ≤ 1) hybrid perovskite materials for high-efficiency thin-film perovskite solar cells (PSCs). The use of (α-FAPbI3)0.95(MAPbBr3)0.05 perovskite prepared by MCS for the thin-film PSCs achieves a maximum PCE of 15.9% from a current–voltage (J–V) scan, which stabilises at 15.4% after 120 s of the maximum power point output. Furthermore, PSCs based on (KPbI3)0.05(FAPbI3)0.9(MAPbBr3)0.05 perovskite prepared by MCS exhibit higher photovoltaic performance and lower hysteresis compared with (α-FAPbI3)0.95(MAPbBr3)0.05, with a maximum PCE of 16.7%. These results indicate that the use of mechanochemically synthesised perovskites provides a promising strategy for high performance PSCs and superior control in optoelectronic properties, leading to improved control in fabrication approaches and facilitating the development of efficient and stable PSCs in the future.
研究领域:
材料科学
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能源科学
·
光电子学
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产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 53
·期 1
·136-147
·
IF 4
Hao Gao,Minghui Zhang,Zicong Xu,Yichuan Chen,Yuehui Hu,Zhijie Yi,Jiayu Huang,Hua Zhu
Due to the hydrophilicity and black-phase instability of FA perovskites, ambient humidity is an unavoidable issue in the processing of perovskite solar cells (PSCs). MACl is among the most popular additives for improving perovskite films, but our experiments confirm that the direct addition of MACl into the precursor solution deteriorates the stability of the final α-FAPbI3 films in humid air, which is attributed to the unwanted pinholes induced by MACl volatilization. To solve this problem, a novel confined-space annealing strategy (CSA) is intentionally developed to control the amount of MACl at a low level. Through retarding the volatilization of MACl and blocking moisture ingress, dense and δ-phase-free FAPbI3 films with excellent crystallinity and stability are achieved at 100 °C under high humidity (RH: 60 ± 10%). We further compare the same amounts of MAI and FACl additives with MACl, discovering that only when MA and Cl work together can pure α-FAPbI3 films be obtained; therefore, a mechanism of MA-assisted nucleation and Cl-induced diffusion recrystallization is inferred. As a result, the PSCs employing optimal films yield a champion power conversion efficiency (PCE) of 17.27% and retain over 90% of the initial PCE after exposure to high humidity for 480 h. Our results offer deep insights into the thermodynamic and kinetic behaviors of MA and Cl in film growth and are beneficial for air-processed FA-based PSCs for commercial application.
研究领域:
材料科学
·
能源技术
·
光伏器件
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产品关联
DOI
PubMed
高影响因子
Laser & Photonics Reviews
·
2025
·
IF 10
Namatullah Nizamani,Xin Chen,Yan-Hui Lou,Run-Jun Jin,Kai-Li Wang,Chun-Hao Chen,Jing Chen,Yu Xia,Lei Huang,Zhao-Kui Wang
In the pursuit of high-performance FAPbI 3 -based perovskite solar cells, the two-step sequential deposition method has garnered significant attention due to its superior control over film crystallization dynamics, critical for achieving uniform, and compact perovskite layers. However, the rapid reaction between PbI 2 and FAI often results in residual PbI 2 clusters, which accelerate the degradation of perovskite solar cells (PSCs). Herein, the dual-site molecular additive 1-aminonaphthalene-6-sulfonic acid (ANSA) is introduced to achieve fast nucleation and slow crystallization, thereby enabling the formation of high-quality FAPbI 3 perovskite films. ANSA coordinates with both PbI 2 and DMSO, facilitating the formation of an improved PbI 2 (DMSO) intermediate phase, enabling a more uniform and complete conversion of PbI 2 into the perovskite phase. Additionally, the amino and sulfonic acid functional groups of ANSA contribute to the passivation of undercoordinated Pb 2+ ions, thereby perovskite films with lower trap densities and larger grain sizes are achieved. Consequently, the power conversion efficiency (PCE) increases from 23.27% in the pristine device to 25.79% for the ANSA-treated device. Furthermore, device stability is significantly improved with the modified device retaining 95% of its original PCE after 1500 h of storage.
研究领域:
材料科学
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光伏技术
·
纳米材料
·
表面化学
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Kailin Li,Zijian Huang,Huachao Zai,Zhongyang Zhang,Feng Wang,Xiao Zhu,Yuetong Wu,Yu Zhang,Fengtao Pei,Rundong Fan,Xiuxiu Niu,Yanrun Chen,Huifen Liu,Ruiyang Yin,Xinmeng Zhuang,Julian A. Steele,Cheng Zhu,Yihua Chen,Tinglu Song,Qi Chen,Huanping Zhou
Metal halide perovskite solar cells (PSCs) have shown great promise for commercialization, yet the weak bonding nature of perovskites renders them vulnerable to external stimuli, undermining the operational longevity of PSCs. Methods aimed at strengthening bonding within perovskite constituents still failed to realize both “high efficiency” and “high stability” in single device. Herein, a localized electrostatic interaction strategy is proposed by employing an unexplored and well-designed organic cation, tetramethyldipropylene-triammonium (IDPA 3+ ). IDPA 3+ features sterically constrained multi-interaction sites that enable strong localized electrostatic interactions with [PbI 6 ] 4− octahedra, inducing perovskite lattice compression. This compression improves perovskite lattice energy through strengthened chemical bonding within bulk lattice, ultimately reinforcing structural stability while simultaneously suppressing ion migration. Consequently, modified formamidinium lead iodide (FAPbI 3 ) devices displayed state-of-the-art stability, showing negligible performance loss under continuous operation at 85 °C and damp-heat test. Notably, the p-i-n device achieved a certified power conversion efficiency (PCE) of 25.28% for 1.00 cm 2 , among the highest published certified PCEs. Overall, this work presents localized electrostatic interaction engineering as a promising strategy to intrinsically stabilize perovskite microstructure, bridging the gap between electrostatic regulation and structural stability while highlighting the broader potential of other triply-charged organic molecules for advancing stable PSCs and optoelectronic devices.
研究领域:
光伏技术
·
材料科学
·
纳米技术
·
能源材料
·
光电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）