Advanced Electronic Materials
·
2023
·Vol. 9
·期 3
·2201222
·
IF 6.2
Kewen Tao,Chenwei Xiong,Jiachun Lin,Decai Ma,Shaopeng Lin,Biao Wang,Huashan Li
Self-powered halide perovskite X-ray detectors have evoked busting interests because they present outstanding properties such as low power consumption, high sensitivity, and integrability without external power source. Nevertheless, existing self-powered X-ray detectors exhibit low sensitivity due to the insufficient charge separation and transport. Herein, a self-powered photodetector for sensitive X-ray and photodetection based on single-crystalline perovskite FAPbBr 3 /NiO x heterostructure is demonstrated. The built-in field of FAPbBr 3 /NiO x heterojunction provides a driving force for separation and transport of photoexcited carriers. Without an external power supply, the photodetector presents excellent photoresponse performance under 450 nm light illumination, including high photoresponsivity (123.6 mA W −1 ), good detectivity ( D = 7.1 × 10 11 Jones), and ultrafast response/recovery time (10/200 ns). Simultaneously, the device achieves photovoltaic effect of 0.80 V and a large mobility–lifetime product of 1.1 × 10 −3 cm 2 V −1 , which enable a superior X-ray sensitivity of 402 µC Gy air −1 cm −2 at zero bias voltage. These results imply that the simple combination of perovskite single crystal and a hole transporting layer provides a flexible platform for the realization of energy-saving self-powered photodetector in visible light and X-rays.
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
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2022
·Vol. 24
·期 18
·10838-10850
·
IF 3.945
Wei Deng,Yuping Gai,Haitao Duan,Zhide Chen,Xiaojun Hu,Sheng Han,Niwei Xu,Shanlin Qiao,Zijian Yao,Fei Jiang
Although reasonably specified and adjustable preparation of nanostructures with specific morphologies, ordered chemical compositions and electronic structures involving advanced energy chemistries is an important research area, high-efficiency, stable, and low-cost electrocatalysts for water splitting are greatly desirable and challenging. In this study, partially delocalized Co–S–Se ultra-thin nanosheets are obtained via a liquid–liquid interface-mediated strategy at an oil–water interface. These Co–S–Se ultra-thin nanosheets exhibit different-sized lamellar structures and have an average thickness of 0.83 nm. The ternary ultra-thin Co0.45S0.38Se0.17 nanosheets demonstrate excellent performance for the OER, accompanied by an overpotential of 290 mV (1.52 V vs. RHE) at 10 mA cm−2, and a Tafel slope of 74.5 mV dec−1. In the meantime, the catalyst recombined with a stoichiometry NiOx catalyst to form a composite interface, which also exhibited a good OER performance, with an overpotential of 260 mV at 10 mA cm−2 and a smaller Tafel slope of 53.9 mV dec−1. The nanosheets can rearrange the electronic density near the metal catalytic centers and increase the electron transfer. DFT calculations indicate that the partially delocalized charges can improve electrocatalytic performances, demonstrating modulated electroreduction properties. Due to the special atomic and electronic structure of the ternary transition metal alloy chalcogenide, the compound has great potential for energy storage, which will help in the rational design and synthesis of high-efficiency electrocatalysts.
研究领域:
材料科学
·
能源化学
·
催化科学
✓ 已验证
DOI
高影响因子
VACUUM
·
2021
·
IF 3.627
Jianbo Wang,Yuanxiang Yin,Yingyue Wang,Kai Zhou,Yun Zhang,Peng Chen,Xiaoyan Qiu
NiO is widely applied as the hole transport layer (HTL) in the high-efficient organic-inorganic hybrid perovskite solar cells (PSCs) due to its stable optical and electrical properties, especially its energy level matches well with the perovskite . We had prepared the inverted planar CH 3 NH 3 PbI 3 PSCs with the solution-processed NiO x -HTLs, and investigated the effects of NiO x precursor solution concentrations on photovoltaic performance and air-stability of PSCs. The un-encapsulated PSCs with the optimized NiO x -0.125 HTLs exhibit a large open-circuit voltage of 1.05 V and high power conversion efficiency of 16.69%. After being exposed to the atmospheric air for 720 hours, it still keeps ∼95% of the initial open-circuit voltage and ∼75% of the initial power conversion efficiency, showing better air-stability than previous CH 3 NH 3 PbI 3 cells with the solution-processed NiO x -HTLs.
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 Science
·
2022
·Vol. 9
·期 26
·2201573
·
IF 17.521
Fangwen Cheng,Fang Cao,Binwen Chen,Xinfeng Dai,Ziheng Tang,Yifei Sun,Jun Yin,Jing Li,Nanfeng Zheng,Binghui Wu
Power conversion efficiency (PCE) and long-term stability are two vital issues for perovskite solar cells (PSCs). However, there is still a lack of suitable hole transport layers (HTLs) to endow PSCs with both high efficiency and stability. Here, NiO x nanoparticles are promoted as an efficient and 85 °C/85%-stable inorganic HTL for high-performance n-i-p PSCs, with the introduction of perovskite quantum dots (QDs) between perovskite and NiO x as systematic interfacial engineering. The QD intercalation enhances film morphology and assembly regulation of NiO x HTLs . Due to structure–function correlations, hole mobility within NiO x HTL is improved. And the hole extraction from perovskite to NiO x is also facilitated, resulting from reduced trap states and optimized energy level alignments. Hence, the promoted NiO x -based n-i-p PSCs exhibit high PCE (21.59%) and excellent stability (sustaining 85 °C aging in air without encapsulation). Furthermore, encapsulated solar modules with QDs-promoted NiO x HTLs show impressive stability during 85 °C/85% aging test for 1000 hours. With high transparency, QDs-promoted NiO x is also demonstrated to be an advanced HTL for semitransparent PSCs. This work develops promising NiO x inorganic HTL in n-i-p PSCs for manufacturing next-generation photovoltaic devices.
研究领域:
材料科学
·
光伏技术
·
纳米技术
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 16
·1217
·
IF 4.3
Xiaoyu Yao,Shuai Ding,Xiaoyu Shen,Congkai Guo,Yao Liu,Wenjuan Xia,Guohua Wu,Yaohong Zhang
In order to improve the electrochromic properties of NiOxfilms, Mg ions were introduced into NiOxfilms using the sol–gel method and the spin-coating method. The introduction of Mg ions leads to the loose structure of the compact NiOxfilm, which can provide more channels for the transport of OH−. In addition, the introduction of Mg ions increases the oxygen vacancies and oxygen interstitial defects in the NiOxfilm, which effectively increases the reactive sites and improves the charge transfer efficiency at the interface between the NiOxfilm and the electrolyte. The electrochemical results further show that the film electrode (NiOx-Mg2) has the largest charge storage capacity when the Mg doping concentration is 10%. Compared with the undoped NiOxfilm, the doping of Mg improves the transmittance modulation (ΔT) performance of the NiOxfilm (ΔTup to 55.8%) and shortens the response time (2.39 s/0.63 s for coloring/bleaching). In general, Mg doping is an effective method for improving the electrochromic properties of NiOxfilms.
研究领域:
材料科学
·
电化学
·
薄膜技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2023
·
IF 4.1
Xuting Dong,Guangcheng Wu,Guanglei Cui,Hao Li,Yarong Shen,Hengli He,Nian Liu,Zewen Zuo,Min Gu
NiO x -based inverted structure perovskite devices possess advantages in the application of single junction and tandem solar cells. However, energy loss and instability originating from interface defects commonly result in inferior device performance. Herein, Potassium Bromide (KBr), as a buffer layer , was inserted between the perovskite and NiO x hole transport layer to modify the interface. The valence band maximum of NiO x improved to −5.37 eV which matches better with perovskite. The lifetime of hot carriers and intrinsic charge recombination revealed by Femtosecond transient absorption spectroscopy (fs-TAS) confirm that KBr modification can facilitate charge separation. Benefiting from the improvement of perovskite quality which results from K + diffusion and enhanced charge transport, the power conversion efficiency (PCE) of the modified device reaches up to 19.21%, whereas the pristine is 17.56%. Meanwhile, the air stability of the unencapsulated device also improved dramatically, which maintains 80% of its initial PCE after 1100 h high humidity storage. This work unambiguous reveals the mechanism of perovskite/NiO x interface modification and provides a facile and effective strategy for interface optimization.
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 and Sustainability Research
·
2022
·Vol. 3
·期 11
·2200055
·
IF 0
Benben Shen,Mengjiong Chen,Fan Zhang,Da Liu,Xinyi Liu,Jin Xie,Shuang Yang,Yu Hou,Hua Gui Yang
Herein, the scalable chemical bath deposited NiO x -NiSO 4 heterostructured films are reported as the efficient hole transport layers (HTLs) in perovskite solar cells. The NiO x -NiSO 4 films show excellent hole extraction ability and reduce interfacial charge recombination in solar cell devices. By using NiO x -NiSO 4 HTLs, a high power conversion efficiency of 20.55% is obtained, which is about 12.23% greater than that of the pure NiO x transport layer. This study provides a simple solution-processing route toward the large-area production and fabrication of full inorganic transport layers for perovskite photovoltaics.
研究领域:
材料科学
·
能源科学
·
光伏技术
✓ 已验证
产品关联
DOI
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Xiangbao Yuan,Haiyun Li,Jing Fan,Lin Zhang,Feng Ran,Menglei Feng,Peiyuan Li,Weixiang Kong,Shijian Chen,Zhigang Zang,Shuangpeng Wang
The effect of substitutional metal dopants in NiOx on the structural and electronic structures is of great interest, particularly for increasing the p-type conductivities as a hole transport layer (HTL) applied in perovskite solar cells (PSCs). In this paper, experimental fabrications and density functional theory calculations have been carried out on Cd-doped NiOx films to examine the effect of divalent doping on the electronic and geometric structures of NiOx. The results indicate that divalent Cd dopants reduced the formation energy of the Ni vacancy (VNi) and created more VNi in the films, which enhanced the p-type conductivity of the NiOx films. In addition, Cd doping also deepened the valence band edge, reduced the monomolecular Shockley–Read–Hall (SRH) recombination losses, and promoted hole extraction and transport. Hence, the PSCs with Cd:NiOx HTLs manifest a high efficiency of 20.47%, a high photocurrent density of 23.00 mA cm–2, and a high fill factor of 79.62%, as well as negligible hysteresis and excellent stability. This work illustrates that divalent elements such as Cd, Zn, Co, etc. may be potential dopants to improve the p-type conductivity of the NiOx films for applications in highly efficient and stabilized PSCs.
研究领域:
材料科学
·
能源科学
·
计算化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Yuning Liu,Jiaji Duan,Jiankai Zhang,Sumei Huang,Wei Ou-Yang,Qinye Bao,Zhuo Sun,Xiaohong Chen
Hole transport layer NiOx-based inverted perovskite solar cells (PSCs) have advantages of simple fabrication, low temperature, and low cost. Furthermore, the p-type NiOx material compared to that of typical n-type SnOx for PSCs has better photostability potential due to its lower photocatalytic ability. However, the NiOx layer modified by some typical materials show relatively simple functions, which limit the synthesized performance of NiOx-based inverted PSCs. Phenethyl ammonium iodide (PEAI) was introduced to modify the NiOx/perovskite interface, which can synchronously contribute to better crystallinity and stability of the perovskite layer, passivating interface defects, formed quasi-two-dimensional PEA2PbI4 perovskite layers, and superior interface contact properties. The PCEs of PSCs with the PEAI-modified NiOx/perovskite interface was obviously increased from 20.31 from 16.54% compared to that of the reference PSCs. The PSCs with PEAI modification remained 75 and 72% of the original PCE values aging for 10 h at 85 °C and 65 days in a relative humidity of 15%, which are superior to the original PCE values (47 and 51%, respectively) for the reference PSCs. Therefore, PSCs with the PEAI-modified NiOx/perovskite interface show higher PCEs and better thermal stability and moisture resistance.
研究领域:
材料科学
·
能源研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROANALYSIS
·
2024
·
IF 2.7
Biao Chen,Fei Hu,Yinghui Zhao,Yuanhaobo Yang,Bin Yan,Qin Yang,Yingchun Gu,Sheng Chen
To pursuit advancing electrochromic technology, the preparation of a novel hierarchical-porous NiO x -decorated ITO transparent conductive electrode was developed through the vapor-assisted conversion and subsequent calcination processes. The modified transparent electrode exhibited advantages in the electrodeposition of conductive polymer films, which significantly enhanced electrochromic cycling stability. Moreover, the complementary electrochromic device based on NiO x -decorated ITO transparent electrode was fabricated, demonstrating rapid response time (1.75 s for coloration and 0.87 s for bleaching), high optical contrast (53.4 %), and remarkable cycling stability (90 % optical contrast retention over 2000 cycles). This finding holds prominent potential for applications in related fields.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Solar RRL
·
2023
·Vol. 7
·期 24
·2300701
·
IF 7.9
Yingying Deng,Chen Dong,Yuhao Song,Miaosen Yao,Wanlong Wang,Junjie Tong,Gentian Yue,Weifeng Zhang,Furui Tan
Hole-transporting layer (HTL) plays a critical role in determining the device performance of carbon-electrode-based perovskite solar cells (C-PSCs). However, the use of best-performing organic HTL (such as 2,2′,7,7′-tetrakis (N, N-di-p-methoxyphenyl-amine)-9,9′-spirobifluorene [Spiro-OMeTAD] or poly(3-hexylthiophene) [P3HT]) for efficient and stable C-PSCs remains challenging due to the hygroscopic additives, unfavorable band alignments, and corrosive carbon pastes. Herein, the additive-free Spiro-OMeTAD/P3HT composite (denoted as Spiro@P3HT) is employed as HTL to construct the fully ambient solution-processed C-PSCs, and NiO x is used as top HTL/buffer layer that protects P3HT from being corroded by carbon pastes. As compared to pristine P3HT, the incorporation of Spiro-OMeTAD not only smooths the HTL morphology, but also shifts down the highest occupied molecular orbital level, thus forming a more energy-favorable cascade that maximizes hole extraction at the perovskite/HTL interface and minimizes recombination loss. Consequently, the target C-PSCs with optimal Spiro@P3HT composite HTL achieve a champion efficiency of 19%. More importantly, benefiting from the self-sealing protection of hydrophobic Spiro@P3HT HTL and carbon electrode, the target C-PSCs exhibit no noticeable performance degradation after storage in ambient air for 1440 h and continuous operation under illumination for 350 h. In this work, a facile way is provided to develop robust and efficient additive-free HTL toward fully solution-processing high-performance C-PSCs.
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 SCIENCE & TECHNOLOGY
·
2022
·
IF 10.319
Liqi Li,Wenjian Shen,Chenquan Yang,Yuxi Dou,Xuehao Zhu,Yao Dong,Juan Zhao,Junyan Xiao,Fuzhi Huang,Yi-Bing Cheng,Jie Zhong
As a convenient, low-cost and up-scalable solution route, chemical bath deposition (CBD) has exhibited impressive advantages in fabricating electron transporting materials like SnO 2 , achieving record efficiencies for regular n-i-p perovskite solar cells (PSCs). However, for the hysteresis-free and potentially more stable inverted p-i-n PSCs, CBD processing is rarely studied to improve the device performance. In this work, we first present a CBD planar NiO x film as the efficient hole transport layer for the inverted perovskite solar cells (IPSCs). The morphologies and semiconducting properties of the NiO x film can be adjusted by varying the concentration of [Ni(H 2 O) x (NH 3 ) 6- x ] 2+ cation via in-situ monitoring of the CBD reaction process. The characterizations of ultraviolet photoelectron spectroscopy, transient absorption spectroscopy, time-resolved photoluminescence suggest that the CBD planar NiO x film possesses enhanced conductivity and aligned energy band levels with perovskite, which benefits for the charge transport in the IPSCs. The devices based on planar NiO x at 50 °C and low nickel precursor concentration achieved an enhanced efficiency from 16.14% to 18.17%. This work established an efficient CBD route to fabricate planar NiO x film for PSCs and paved the way for high performance PSCs with CBD-prepared hole transporting materials.
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
危险品化学品经营许可证（带存储）