Journal of Energy Chemistry
·
2022
·
IF 13.599
Xingyu Pu,Jiabao Yang,Tong Wang,Shuaici Cheng,Qi Cao,Junsong Zhao,Hui Chen,Yixin Zhang,Tingting Xu,Ilhom Tojiboyev,Hadi Salari,Xuanhua Li
All-inorganic CsPbI 2 Br perovskite solar cells (PSCs) have received extensive research interests recently. Nevertheless, their low efficiency and poor long-term stability are still obstacles for further commercial application. Herein, we demonstrate that high efficiency and exceptional long-term stability are realized by incorporating gadolinium(III) chloride (GdCl 3 ) into the CsPbI 2 Br perovskite film. The incorporation of GdCl 3 enhances the Goldschmidt tolerance factor of CsPbI 2 Br perovskite, yielding a dense perovskite film with small grains, thus the α-phase CsPbI 2 Br is remarkably stabilized. Additionally, it is found that the GdCl 3 -incorporated perovskite film achieves suppressed charge recombination and appropriate energy level alignment compared with the pristine CsPbI 2 Br film. The noticeable increment in efficiency from 14.01% (control PSC) to 16.24% is achieved for GdCl 3 -incorporated PSC. Moreover, the nonencapsulated GdCl 3 -incorporated PSC exhibits excellent environmental and thermal stability, remaining over 91% or 90% of the original efficiency after 1200 h aging at 40% relative humidity or 480 h heating at 85 °C in nitrogen glove box respectively. The encapsulated GdCl 3 -incorporated PSC presents an improved operational stability with over 88% of initial efficiency under maximum power point (MPP) tracking at 45 °C for 1000 h. This work presents an effective ion-incorporation approach for boosting efficiency and long-term stability of all-inorganic PSCs.
研究领域:
材料科学
·
能源研究
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·
IF 19
Yaru Li,Yong Zhang,Peide Zhu,Jingbai Li,Jiawen Wu,Jiyao Zhang,Xianyong Zhou,Zhengyan Jiang,Xingzhu Wang,Baomin Xu
CsPbI 2 Br perovskite solar cells (PSCs) have garnered significant attention owing to their remarkable thermal stability and desirable bandgap. However, CsPbI 2 Br-based devices still face critical challenges, particularly at the interfaces between the active layer and adjacent components. In this study, a multifunctional ZnO composition has developed as the electron transporting layer (ETL) for CsPbI 2 Br PSCs, enabling simultaneous efficient charge extraction and passivation of buried interface defects in CsPbI 2 Br. The nanocomposite, composed of PbCl 2 -modified ZnO (PbCl 2 -ZnO), facilitates the regulation of bandgap and conduction band to align the energy level of ETL and CsPbI 2 Br. Additionally, the residual PbCl 2 at the buried interface of the perovskite incorporates into the perovskite lattice, reducing I defect and thus improving film quality. The improved energy level alignment at the ETL/CsPbI 2 Br interface and the suppressed I defect-induced carrier nonradiative recombination result in a remarkable reduction in energy loss from 0.73 to 0.52 eV. Finally, the PbCl 2 -ZnO hybrid nanocomposite ETL significantly enhances the efficiency of CsPbI 2 Br PSCs, increasing it from 14.15% to 17.46%, representing one of the highest reported power conversion efficiency (PCE) values for CsPbI 2 Br PSCs. These findings demonstrate the potential of PbCl 2 -ZnO hybrid nanocomposite as an effective ETL for CsPbI 2 Br PSCs.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2024
·
IF 5.4
Zijun Niu,Weifeng Liu,Kexiang Wang,Weiwei Sun,Xiaonan Huo,Yanqin Miao,Tingting You,Penggang Yin
Inorganic CsPbI2Br carbon-based perovskite solar cells (C-PSCs) are considered as an alternative promising contender in the field of photovoltaics, attributed to their remarkable thermal stability and cost-effectiveness. However, the defects located at the electron transporting layer (ETL)/perovskite interface (i.e., buried interface) and unsatisfactory crystallinity of CsPbI2Br films hinder the progress in enhancing the power conversion efficiency (PCE). Herein, we put forward facile acetate-assisted buried interface engineering to passivate TiO2/perovskite interface defects along with regulate the crystallization process of CsPbI2Br. Multifunctional small molecule interface modifier zinc acetate (Zn(Ac)2) is introduced into the surface of TiO2 ETL, which can passivate the oxygen vacancy defects of TiO2 and optimize the energy level alignment at the TiO2/CsPbI2Br interface. Meanwhile, part of Ac– may be dissolved in the CsPbI2Br precursor to retard its nucleation process, leading to enhanced crystallinity with a larger grain size of the CsPbI2Br film. As a result, reduced interface defects and bulk defects as well as enhanced electron extraction are achieved, which substantially enhance the PCE of CsPbI2Br C-PSCs from 12.54% to 14.20%, among the highest values of this type of device. Besides, thermal and long-term storage stabilities of the optimized devices are improved.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 10
·3351-3358
·
IF 7.059
Shoulong Chen,Tianju Zhang,Xiaolin Liu,Jinli Qiao,Lin Peng,Jun Wang,Yongsheng Liu,Tieying Yang,Jia Lin
Inorganic CsPbI2Br halide perovskite has received extensive attention due to its excellent thermal stability and suitable bandgap for high-performance solar cells. However, CsPbI2Br can easily transform from the perovskite phase to the non-perovskite phase due to a water vapour-induced phase transition under ambient conditions, leading to a rapid degradation of device performance. Herein, we introduced lanthanum (La3+) ions into the lattice to stabilize the perovskite phase in CsPbI2Br-based all-inorganic solar cells. A power conversion efficiency of 8.03% was obtained at an optimized La3+-doping level of 2%, leading to a 27% efficiency improvement. Moreover, the La3+-doped solar cell retained 90% of its efficiency in ambient air for 400 h, showing a significantly enhanced moisture stability compared to that of the pristine (undoped) device. Detailed analysis indicates that La3+-ions can induce lattice shrinking and thus inhibit the formation of a non-perovskite phase, and enhance the charge carrier lifetime, which contribute to the improved moisture stability and efficiency. Our results indicate that highly stable all-inorganic solar cells can be produced in an air atmosphere, showing great potential for future commercialization.
研究领域:
材料科学
·
太阳能电池
·
光电转换
✓ 已验证
DOI
高影响因子
Solar RRL
·
2020
·Vol. 4
·期 7
·2000016
·
IF 7.527
Chong Liu,Jiajun He,Miao Wu,Yuanchuang Wu,Pengcheng Du,Limin Fan,Qin Zhang,Duofa Wang,Tianjin Zhang
The energy loss of all-inorganic metal halide perovskite solar cells is large, which reduces the open-circuit voltage and photoelectron conversion efficiency of the device. Herein, it is found that the cathode electron transfer speed is much lower than the anode hole transfer speed in CsPbI 2 Br perovskite solar cell with fluorine-doped tin oxide (FTO) glass/SnO 2 /CsPbI 2 Br/carbon structure, which induces charge accumulation at the cathode and energy loss of the device accordingly. By introducing a new conductive polymer additive polyaniline (PANI) to the CsPbI 2 Br film, the electron transfer speed at the cathode is enhanced, resulting in balanced charge transfer at both electrodes and reduced energy loss of the device. Ultraviolet photoelectron spectroscopy measurement reveals that the PANI pushes the conduction band minimum of CsPbI 2 Br upward, leading to stronger driving force for electron extraction. Therefore, the nonradiative recombination at the SnO 2 /CsPbI 2 Br interface is greatly suppressed. In addition, PANI can also effectively passivate defects and promote the crystal quality of CsPbI 2 Br, leading to reduced nonradiative recombination in perovskite materials. Accordingly, the optimized all-inorganic CsPbI 2 Br solar cell delivers a high V oc of 1.33 V and power conversion efficiency (PCE) of 13.52%.
研究领域:
材料科学
·
光伏技术
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY
·
2021
·
IF 5.742
Jixi Wang,Yangbiao Liu,Xiudi Xiao,Zhuoneng Bi,Yuan Lu,Guizhang Sheng,Xuesong Cai,Yanqing Zhu,Xueqing Xu,Gang Xu
All inorganic perovskite solar cells (PSCs) have been demonstrated to get tremendous interest recently owing to their better thermal stability. Nevertheless, some CsPbI 2 Br films prepared at low temperature have lower quality compared to those annealing at high temperature. Herein, to obtain high performance PSCs, a simple post-treatment strategy is presented by spin coating acetylacetone (AA) solution on the CsPbI 2 Br films. The AA treatment can reduce the density traps on the CsPbI 2 Br films surface and enlarge the size of grains, resulting in enhanced performance PSCs. After optimizing surface treatment, the devices based on low-temperature-processed CsPbI 2 Br with AA treatment achieved a power conversion efficiency (PCE) of 14.43%. The better CsPbI 2 Br films quality and interface contact of hole transport layer (HTL)/CsPbI 2 Br result in better device stability. Therefore, it could be a promising post treatment method for enhancing the performance of PSCs by introducing AA on the perovskite surface.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Energy Materials
·
2021
·Vol. 12
·期 2
·2103019
·
IF 29.368
Shaomin Yang,Jialun Wen,Zhike Liu,Yuhang Che,Jie Xu,Jungang Wang,Dongfang Xu,Ningyi Yuan,Jianning Ding,Yuwei Duan,Shengzhong (Frank) Liu
Inorganic CsPbI 2 Br perovskite is promising for solar cell applications due to its excellent thermal stability and optoelectronic characteristics. Unfortunately, the current high-efficiency CsPbI 2 Br perovskite solar cells (PSCs) are mostly fabricated in an inert atmosphere due to their instability to moisture. Herein, a low-dimensional intermediate-assisted growth (LDIAG) method is reported for the deposition of CsPbI 2 Br film in ambient atmosphere by introducing imidazole halide (IMX: IMI and IMBr) into the precursor solution to control both nucleation and growth kinetics. The IMX first combines with PbI 2 in the precursor film to form a 2D intermediate which then gradually releases PbI 2 to slowly form high-quality CsPbI 2 Br film during annealing. It is found that the LDIAG method produces a uniform, highly crystalline, pinhole-free, and stable CsPbI 2 Br film with low defect density. Consequently, the solar cell efficiency is increased to as high as 17.26%, one of the highest for this type of device. Furthermore, the bare device without any encapsulation shows excellent long-term stability with ≈86% of its initial efficiency retained after being exposed to the ambient environment for 1000 h. This work provides a perspective to tune the intermediate phases and crystallization pathway for high-performance inorganic PSCs formed under ambient conditions.
研究领域:
材料科学
·
能源技术
·
光伏器件
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY
·
2021
·
IF 5.742
Shenshen Zheng,Haobin Wang,Peng Wei,Huamei Chen,Yahong Xie
All-inorganic carbon-based perovskite solar cells (C-PSCs) with CsPbI 2 Br as photosensitizer have attracted great attention due to their low cost, high efficiency, and good stability. However, the CsPbI 2 Br film prepared by the solution method usually has many defects, which reduces the charge extraction rate and photoelectric performance. In this paper, intermediate gradient annealing and antisolvent ethyl acetate treatment are combined to prepare CsPbI 2 Br films with good crystallinity and few voids. The surface of the obtained CsPbI 2 Br film is then treated using tetrabutylammonium iodide (TBAI), which can interact with the Pb-I framework to passivate defect states and extend the carrier lifetime. Finally, the champion power conversion efficiency (PCE) of the optimized C-PSCs with a structure of FTO/SnO 2 /CsPbI 2 Br/carbon electrode prepared in the air reach 12.29%. At the same time, TBAI molecules also effectively enhance the stability of the PSCs, and the unencapsulated device can still maintain 90% of the initial efficiency after 300 h of storage in an ambient air atmosphere with a relative humidity of 20%-30%. This work provides a simple and effective strategy for the preparation of cheap, high-performance, and stable all-inorganic C-PSCs under atmospheric conditions, and also increases the feasibility of PSCs commercialization.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Jiahao Wang,Shiqiang Fu,Xiaohui Liu,Haobo Yuan,Zuxiong Xu,Chenyang Wang,Jing Zhang,Like Huang,Ziyang Hu,Yuejin Zhu
All-inorganic CsPbI 2 Br material has attracted considerable attention due to its good balance between phase stability and absorption capacity. However, the power conversion efficiency (PCE) and device stability of CsPbI 2 Br-based perovskite solar cells (PSCs) still lag far behind those of their counterparts, mainly deriving from the notoriously poor moisture stability under humid environment and large serious charge recombination. Herein, a typical phenethylammonium chlorine (PEACl) and its fluorinated derivative 4-fluoro-phenethylammonium chlorine (F-PEACl) are individually incorporated to modify the surface of CsPbI 2 Br film to ameliorate the above issues. Benefiting from the comprehensive passivation effect of ammonium halogen, the trap states of treated CsPbI 2 Br are vastly suppressed. In particular, fluorination significantly increased the dipole moment and hydrophobic property of F-PEACl. Thus, the present CsPbI 2 Br PSC achieves a champion PCE of 16.29% with high open-circuit voltage of 1.272 V, while the reference device and PEACl-treated device yield PCEs of 14.30% and 15.64%, respectively. More importantly, the PSC with F-PEACl capping layer retains 87.2% of its initial PCE after 1000 h storage under 20% RH ambient without encapsulation. Our results reveal the underlying mechanism of performance improvement by surface passivation strategy and provide an effective approach to further boost the CsPbI 2 Br PSC efficiency and stability.
研究领域:
材料科学
·
能源科学
·
光伏技术
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2020
·
IF 3.724
Caiyun Zhang,Xiaojing Wan,Jiadong Zang,Qi Liu,Yuemeng Fei,Ze Yu
All-inorganic CsPbI 2 Br perovskite with relatively high phase stability and a suitable band gap has been considered as a promising candidate for photovoltaic application. However, in comparison with its organic–inorganic counterparts, it still shows unsatisfactory efficiency and high moisture sensitivity. Here, polyethylene glycol (PEG) is introduced into the CsPbI 2 Br precursor solution. It is revealed that Lewis base PEG interacts with Pb 2+ , which can slow down the crystallization rate, regulate the energy levels, and passivate the defect density of CsPbI 2 Br films. As a result, the optimized devices with PEG exhibit a power conversion efficiency (PCE) of 13.59% under one sun illumination (100 mW cm ‒2 ), which is considerably higher than that of the control devices (10.09%), owing to the reduced nonradiative recombination losses for the former CsPbI 2 Br films. The results demonstrate that using polymer additives to improve the device performance is an effective strategy for all-inorganic perovskite solar cells.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Solar RRL
·
2020
·Vol. 4
·期 11
·2000431
·
IF 7.527
Pengfei Xie,Guizhi Zhang,Zechao Yang,Zhenxiao Pan,Yueping Fang,Huashang Rao,Xinhua Zhong
Carbon electrodes are a promising alternative to metal electrodes in the access of high-stable and low-cost perovskite solar cells (PSCs). However, polar components (including cyclohexanone, terpineol, etc.) in commercial carbon pastes for carbon electrodes usually corrode perovskite materials, thereby deteriorating the photovoltaic performance of the resulting solar cells. Therefore, the development of perovskite-compatible carbon pastes and carbon electrodes is of great significance in obtaining high-performance carbon-based PSCs. Herein, carbon pastes based on low polar alkane solvents are developed for perovskite-compatible carbon electrode (PCCE) in the construction of carbon-based CsPbI 2 Br PSCs. The optimized cells based on PCCE offer a champion efficiency of 13.16% ( J SC = 14.33 mA cm −2 , V OC = 1.22 V, and fill factor (FF) = 0.75), which is remarkably higher than that of commercial carbon paste-derived counterparts (11.51%). Even without encapsulation, CsPbI 2 Br PSCs based on PCCE maintain over 93% of their initial efficiency in an air atmosphere with a humidity of 30–40% for over 1000 h.
研究领域:
材料科学
·
能源技术
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
Nano-Micro Letters
·
2021
·Vol. 14
·期 1
·1-15
·
IF 16.419
Xu Jie,Cui Jian,Yang Shaomin,Han Yu,Guo Xi,Che Yuhang,Xu Dongfang,Duan Chenyang,Zhao Wenjing,Guo Kunpeng,Ma Wanli,Xu Baomin,Yao Jianxi,Liu Zhike,Liu Shengzhong
A series of 10 imidazolium-based ionic liquids (IILs) with different cations and anions have applied to unravel the passivation mechanism of the IILs on CsPbI 2 Br inorganic perovskites.
It is found that anions of IILs play a more important role in passivation of lead- and cesium-related defects in inorganic perovskite compared with imidazole cations because they can form strong ionic interactions (Pb-F, Cs-F).
A high-power conversion efficiency of 17.02% is obtained, which is among the highest values of CsPbI 2 Br-based perovskite solar cells.
研究领域:
材料科学
·
能源科学
✓ 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）