Solar RRL
·
2024
·Vol. 8
·期 14
·2400244
·
IF 6
Mingyue Xiao,Bin Chen,Li Pan,Liya Zheng,Runze Yu,Zhu Fang,Gang Chen
Herein, a new type of CsPbI 3 -based 2D Dion–Jacobson (DJ) perovskites is reported, featuring a general formula of (PDMA)Cs n −1 PbnI 3 n +1 ( n = 1, 2, 3, 4) with 1,4-phenylenedimethanammonium (PDMA) as the organic spacer cation. The crystal structure, optical and electric properties, and surface morphology of the perovskite films are fully surveyed. The solar cell device based on the n = 4 film delivers a champion power conversion efficiency (PCE) of 11.27%, further improved to 12.61% by treating with the PDMA molecules. The PDMA passivation suppresses non-radiative recombination, extends charge-carrier lifetime, and reduces open-circuit voltage loss. A gradient energy level near the film surface facilitates electron extraction, alleviating charge accumulation. The PDMA molecules form a protective layer, inhibiting water infiltration and enhancing stability. The optimized device exhibits excellent shelf stability with no PCE decay after 110 days. In this study, a dual-functional molecule is introduced as a new DJ-type spacer and an effective passivation agent for efficient and stable CsPbI 3 -based 2D perovskite solar cells.
研究领域:
材料科学
·
光伏技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2024
·
IF 7.2
Dongying Fu,Zhuo Chen,Shufang Wu,Yanli Ma,Xian-Ming Zhang
Dion-Jacobson (DJ) hybrid perovskite (HP) single-crystal photodetectors often require operation under external bias due to the centrosymmetric structure of the material, which is not conducive to the intelligence and lightweight of the devices. To solve this problem, the key issue is how to regulate the noncovalent interaction between interlayer diammonium cations and inorganic frameworks to successfully induce polarity. However, there is a lack of research on the relationship between the configuration of diammonium cations and the structure symmetry of DJ HPs. Herein, we successfully constructed a series of polar DJ HPs (1,3-BMACH)PbX4 (X = Cl, Br, I; 1,3-BMACH is 1,3-bis(aminomethyl)cyclohexane) by changing the configuration of organic cations. It was found that the hydrogen bonding strength between 1,3-BMACH2+ cations and the bilateral inorganic framework is different, and it causes the inorganic layer to be more twisted, resulting in a deviation of the positive and negative charge centers in (1,3-BMACH)PbX4 (X = Cl, Br, I) and successfully inducing polarity. Subsequently, we achieved efficient self-powered X-ray detection in the single-crystal device of (1,3-BMACH)PbBr4 through polarity-induced bulk photovoltaic effect, which owns outstanding sensitivity (157.3 μC Gy–1 cm–2, 0 V bias) and stability under X-ray radiation. Studying the relationship between the configuration of diammonium cations and the crystal structure in DJ HPs can help us design more efficient self-powered optoelectronic devices.
研究领域:
材料科学
·
光电材料
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2023
·Vol. 35
·期 22
·2210611
·
IF 29.4
Mengyu Guan,Yunlong Xie,Yang Zhang,Zixin Gu,Lei Qiu,Zhuojie He,Bingkun Ye,Ady Suwardi,Zhigao Dai,Guogang Li,Guangwei Hu
Humidity- and moisture-induced degradation has been a longstanding problem in perovskite materials, affecting their long-term stability during applications. Counterintuitively, the moisture is leveraged to tailor the reversible hydrochromic behaviors of a new series of 2D Dion–Jacobson (DJ) perovskites for reconfigurable optoelectronics. In particular, the hydrogen bonds between organic cations and water molecules can be dynamically modulated via moisture removal/exposure. Remarkably, such modulation confines the movement of the organic cations close to the original position, preventing their escape from crystal lattices. Furthermore, this mechanism is elucidated by theoretical analysis using first-principles calculations and confirmed with the experimental characterizations. The reversible fluorescent transition 2D DJ perovskites show excellent cyclical properties, presenting untapped opportunities for reconfigurable optoelectronic applications. As a proof-of-concept demonstration, an anti-counterfeiting display is shown based on patterned reversible 2D DJ perovskites. The results represent a new avenue of reconfigurable optoelectronic application with 2D DJ perovskites for humidity detection, anti-counterfeiting, sensing, and other emerging photoelectric intelligent technologies.
研究领域:
材料科学
·
光电子学
·
纳米技术
✓ 已验证
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2024
·
IF 7.2
Fangfang Yuan,Yuncai Liang,Zhipeng Miao,Ting Zhang,Rudai Zhao,Sihui Peng,Yunhang Xie,Wenlong Liang,He Zhu,Pengwei Li,Yiqiang Zhang,Yanlin Song
Two-dimensional (2D) Dion–Jacobson (DJ) perovskites have been extensively investigated in perovskite solar cells (PSCs) owing to their superior stability and structural diversity. However, the efficiency is still limited by dielectric confinement and carrier localization in the transport process. Here, we introduced a new spacer cation, namely, 2,2′-oxybis(ethylamine) hydroiodide (OBEAI), which clearly clarified the fundamental physical properties of constructing 2D DJ perovskites to optimize charge transfer properties for high-performance 2D DJ PSCs. The strong electronegativity of OBEA enhanced the overlap of charge density in the spacing through its interaction with inorganic [PbI6]4– layers, promoting charge migration across confinement layers. In addition, the aggregation of strong electronegativity of OBEA and metal cations in precursor solutions enlarged the particle size, which reduced random nucleation sites, thereby inhibiting the production of low n-value perovskites (n ≤ 2). Thanks to these merits, the electrons’ transport of (OBEA)MA4Pb5I16 (MA: methylamine) was greatly promoted, which supported efficient charge extraction at the device level. The resultant (OBEA)MA4Pb5I16 solar cells delivered a power conversion efficiency (PCE) of 14.33% and further improved to 18.81% based on (OBEA)FA4Pb5I16 (FA: formamidine) with exceptional stability of T90 (preserve 90% of the initial PCE) after 2000 h.
研究领域:
材料科学
·
太阳能
·
光伏技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Liting Tao,Li Ding,Yuyang Li,Hui Liu,Meiping Gao,Deren Yang,Yanjun Fang
2D Dion-Jacobson (DJ) perovskites have attracted increasing attention in X-ray detection due to their improved charge transport properties relative to the common Ruddlesden-Popper (RP) counterparts, while maintaining commendable environmental stability. However, achieving scalable and high-throughput manufacturing of the high-performance DJ perovskite X-ray detectors presents a notable challenge. Here, we have employed a ternary-solvent-ink strategy to fabricate quasi-2D DJ perovskite films for X-ray detectors via the spray-coating process. Our results indicate that the incorporation of ionic liquid Methylammonium Acetate into the conventional binary solvent precursor, composed of N,N-Dimethylformamide and Dimethyl Sulfoxide, effectively impedes the formation of small n phases and concurrently suppresses the pinholes in the resulting DJ perovskite films, thus facilitating improved charge transport properties. Consequently, a large sensitivity of 4853 μC·Gyair−1·cm−2 and an ultralow detection limit down to 39 nGyair s-1 have been achieved in the devices under the self-powered mode, representing the best performing DJ perovskite film based X-ray detectors that operate without external bias. The results presented here signify a crucial advancement towards the scalable production of quasi-2D DJ perovskite X-ray detectors for high-performance X-ray detection applications in the future.
研究领域:
材料科学
·
物理学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-10
·
IF 14.7
Zhang Weichuan,Liu Ziyuan,Zhang Lizhi,Wang Hui,Jiang Chuanxiu,Wu Xianxin,Li Chuanyun,Yue Shengli,Yang Rongsheng,Zhang Hong,Zhang Jianqi,Liu Xinfeng,Zhang Yuan,Zhou Huiqiong
Stability has been a long-standing concern for solution-processed perovskite photovoltaics and their practical applications. However, stable perovskite materials for photovoltaic remain insufficient to date. Here we demonstrate a series of ultrastable Dion−Jacobson (DJ) perovskites (1,4-cyclohexanedimethanammonium)(methylammonium) n −1 Pb n I 3 n +1 ( n ≥ 1) for photovoltaic applications. The scalable technology by blade-coated solar cells for the designed DJ perovskites (nominal n = 5) achieves a maximum stabilized power conversion efficiency (PCE) of 19.11% under an environmental atmosphere. Un-encapsulated cells by blade-coated technology retain 92% of their initial efficiencies for over 4000 hours under ~90% relative humidity (RH) aging conditions. More importantly, these cells also exhibit remarkable thermal (85 °C) and operational stability, which shows negligible efficiency loss after exceeding 5000-hour heat treatment or after operation at maximum power point (MPP) exceeding 6000 hours at 45 °C under a 100 mW cm −2 continuous light illumination.
研究领域:
材料科学
·
太阳能
·
光伏技术
✓ 已验证
DOI
PubMed
高影响因子
Journal of Physical Chemistry Letters
·
2023
·
IF 5.7
Zuoming Hou,Yueyue He,Wei Cao,Dongying Fu
Two-dimensional (2D) Dion–Jacobson (DJ) hybrid perovskites with exceptional stability and enhanced out-of-plane carrier transport are regarded as one of the competive candidates for constructing next-generation photodetectors. However, the studies of DJ hybrid perovskites on weak light detection remain scarce, and the devices based on them usually show relatively poor weak light detection ability, with a detection limit of around μW/cm2. Herein, a new DJ hybrid perovskite (3AMPY)(MA)Pb2Br7 [3AMPY is 3-(aminomethyl)pyridinium, and MA is methylammonium] with short interlayer spacing and more lattice rigidity is obtained. The devices based on (3AMPY)(MA)Pb2Br7 crystals exhibit an ultrahigh sensibility to weak light at 377 and 405 nm, with an extremely low detection limit of ∼70 nW/cm2. Moreover, the on/off ratios and detectivity of the devices can reach ∼103 and ∼1012 Jones at both 377 and 405 nm, respectively. This work highlights great potential of DJ hybrid perovskites toward weak light detection.
研究领域:
材料科学
·
光电子学
·
钙钛矿太阳能电池
·
半导体物理
·
晶体工程
✓ 已验证
DOI
高影响因子
Small
·
2022
·Vol. 19
·期 3
·2205088
·
IF 15.153
Lu Jin,Ningyu Ren,Pengyang Wang,Renjie Li,Qifan Xue,Fei Huang,Xiaobo Zhang,Ying Zhao,Xiaodan Zhang
Surface defects-mediated nonradiative recombination plays a critical role in the performance and stability of perovskite solar cells (PSCs) and surface post-treatment is widely used for efficient PSCs. However, the commonly used surface passivation strategies are one-off and the passivation defect ability is limited, which can only solve part of the defects in the topmost surface area. Here, a secondary anti-solvent strategy is proposed to further reduce surface defects based on conventional surface passivation for the first time. Based on this, the crystallization quality of 2D Dion–Jacobson perovskite is enhanced and the surface defects density is further reduced by nearly two orders. In addition, a gradient structure of perovskite with n = 2 phases located at the top of the film and 3D-like phases located at the bottom of the film can also be obtained. The modulated perovskite film boosts the efficiency of 2D perovskites ( n = 5) up to 19.55%. This strategy is also very useful in other anti-solvent processed perovskite dipping systems, which paves a promising avenue for minimizing surface defects toward highly efficient perovskite devices.
研究领域:
材料科学
·
太阳能
·
纳米技术
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 21
·11377-11387
·
IF 11.9
Chao Zhou,Yonglei Han,Lei Cheng,Ruijie Ma,Fei Wang,Shuchen Weng,Guicheng Yu,Fang Lin,Kang Zhou,Hanlin Hu,Xiao Liang,Yongfei Wang,Haoran Lin,Gang Li
Two-dimensional (2D) Dion–Jacobson (DJ) halide perovskites are being intensively investigated owing to their superior stability compared with 2D Ruddlesden–Popper (RP) perovskites. Although various organic cations have been reported to form 2D DJ perovskites, their structure–property relationships are rarely studied. In this work, two novel organic cations MDAN (4,4′-methylenedianilinium) and EDAN (4,4′-ethylenedianilinium) were applied to form quasi-2D DJ perovskites with nominal layer number n = 6. An (EDAN)MA5Pb6I19:0.15MACl based inverted solar cell achieved a power conversion efficiency (PCE) of 13.2%, outperforms the 9.6% PCE achieved by a (MDAN)MA5Pb6I19:0.15MACl based device. The formation of quasi-2D perovskites with high-n values was observed for both compounds, while the superior performance is demonstrated by the (EDAN)MA5Pb6I19:0.15MACl based device, which could be attributed to its better film morphology and lower defect density. Intriguingly, we found that EDAN based quasi-2D perovskites were evenly distributed in the film while MDAN based quasi-2D perovskites concentrated near the film surface, accounting for an unfavorable electronic band alignment of the latter. Both (MDAN/EDAN)MA5Pb6I19:0.15MACl films remained unchanged in air with 50% relative humidity for 20 days. This work not only presents a decent device performance, but also explores understanding of tuning morphology towards high-efficiency quasi-2D Dion–Jacobson perovskite solar cells.
研究领域:
材料科学
·
光伏技术
·
有机-无机杂化钙钛矿
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）