ACS Applied Energy Materials
·
2021
·
IF 6.024
Zheng Jiang,Jun Wang,Enyi Hu,Jingjing Liu,Lei Yu,Faze Wang
The p-i-n junction structure has garnered great interest from researchers due to its increased photoactive area and wider space charger region compared with that of the p-n junction. Herein the ultrawide bandgap (∼6.7 eV) semiconductor alumina (Al2O3) has been introduced to construct a p-i-n junction with ZnO and NiO. ZnO–Al2O3–NiO powders are suitable for electrolyte membrane material of low-temperature solid oxide fuel cells (LT-SOFCs). The insulating Al2O3 brings a doubled depletion region and more effective charge separation compared with the p-n junction consisting of ZnO and NiO. The fuel cell based on the p-i-n junction membrane material delivers an enhanced maximum power density (MPD) of 917 mW cm–2 along with a high open-circuit voltage (OCV) of 1.013 V at 550 °C. An analysis based on the space charge region and energy band alignment in the p-i-n junction is proposed to account for the appreciable cell performance and ionic conductivity, as well as the electron blocking and charge separation ability. This study presents a practical p-i-n junction design based on ZnO–Al2O3–NiO via a solution process for LT-SOFC electrolyte material and sheds light on the extensive exploration of p-i-n junctions applied in LT-SOFCs.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Kun Ni,Qinyi Ren,Xiaohong Zhang,Ruiyuan Liu
Nanofluidic ionic diodes enable directional ion transport through confined nanochannels, holding great promise for energy harvesting and iontronic applications. However, their development in moisture-enabled power generation remains limited by insufficient carrier generation and unstable device performance. Here, a trilayer nanofluidic ionic diode-based moist-electric generator is reported, integrating positively charged fabrics, lithium chloride-doped neutral fabrics, and negatively charged fabrics into a p-i-n configuration. The hygroscopic neutral layer promotes efficient moisture absorption and ion dissociation, while the adjacent charged layers, featuring nanochannels formed by graphene oxides, establish a built-in electric field to rectify cation and anion fluxes. This unique structural and functional synergy enables continuous carrier generation and directional transport, achieving both a remarkable voltage of ≈1.38 V and a current of ≈35 µA cm −2 and further exhibiting a peak voltage of ≈1.6 V with stable operation for over 600 h by employing active metal electrodes. Beyond energy harvesting, the diode-like rectification allows implementation of ionic logic gates and foldable configurations for powering portable electronics. This work establishes a versatile platform for high-performance nanofluidic diode-based devices, bridging sustainable power generation with emerging iontronic systems.
研究领域:
纳米能源
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离子电子学
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功能材料
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生物医学工程
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可持续能源
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微纳系统
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Energy
·
2024
·
IF 49.7
Meng Hongguang,Mao Kaitian,Cai Fengchun,Zhang Kai,Yuan Shaojie,Li Tieqiang,Cao Fangfang,Su Zhenhuang,Zhu Zhengjie,Feng Xingyu,Peng Wei,Xu Jiahang,Gao Yan,Chen Weiwei,Xiao Chuanxiao,Wu Xiaojun,McGehee Michael D.,Xu Jixian
The manufacturing of perovskite solar cells under ambient conditions is desirable, yet the efficiency of p–i–n perovskite solar cells fabricated in air still lags behind those made in an inert atmosphere. Here we introduce an ionic pair stabilizer, dimethylammonium formate (DMAFo), into the perovskite precursor solution to prevent the degradation of perovskite precursors. DMAFo inhibits the oxidization of iodide ions and deprotonation of organic cations, improving the crystallinity and reducing defects in the resulting perovskite films. We show the generation of additional p-type defects during ambient air fabrication that suggests the need for improving bulk properties of the perovskite film beyond surface passivation. Upon addition of DMAFo, we demonstrate that the efficiency of inverted p–i–n solar cells based on perovskite layers with 1.53-eV and 1.65-eV bandgaps fabricated under ambient conditions (25–30 °C, 35–50% relative humidity) increases by 15–20%. We achieve a certified stabilized efficiency of 24.72% for the 1.53-eV cell, on a par with state-of-the-art counterparts fabricated in an inert atmosphere.
研究领域:
材料科学
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太阳能
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化学
✓ 已验证
DOI
高影响因子
Science China-Chemistry
·
2019
·Vol. 62
·期 6
·767-774
·
IF 6.085
Li Erpeng,Li Wenqin,Li Linchang,Zhang Hao,Shen Chao,Wu Zihua,Zhang Weiwei,Xu Xiaojia,Tian He,Zhu Wei-Hong,Wu Yongzhen
The development of p-i-n structured perovskite solar cells (PSCs) requires more extensive explorations on seeking efficient, low cost and stable hole transporting materials (HTMs). Small molecular HTMs are superior to polymeric ones in terms of synthetic reproducibility as well as purity. However, thin films composed of small molecules are usually labile during the solution-based perovskite deposition. Herein, we propose a molecular engineering strategy of incorporating oligothiophene as conjugation bridge to develop robust oligomer HTMs for p-i-n type PSCs. Upon increasing the oligothiophene chain length from α-bithiophene to α-quaterthiophene and α-hexathiophene, their HOMO energy levels remain unchanged, but their solubility in common organic solvents decreased remarkably, thus greatly enhancing their tolerance to the perovskite deposition. The rational design of oligothiophene chain length can effectively tune their optoelectronic properties as well as thin film stability under polar solvent soaking. The best performance is achieved by an α-quaterthiophene based HTM (QT), showing a high efficiency of 17.69% with fill factor of 0.81, which are comparable to those of a commercially available benchmark polymer HTM (poly[bis (4-phenyl)(2,4-dimethylphenyl) amine], PTAA) based devices fabricated under the same conditions. Our developed oligomer system not only provides the definite molecular structures like small molecule-type HTMs, but also exhibits the excellent film-forming like polymer-type HTMs, thus achieving the well-balanced parameters among solvent tolerance, thin film conductivity, and interfacial charge transfer efficiency, especially building up a platform to develop low cost and reproducible efficient HTMs in p-i-n structured perovskite solar cells.
研究领域:
材料科学
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太阳能
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有机电子学
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光伏技术
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2024
·Vol. 36
·期 18
·2309844
·
IF 27.4
Rundong Fan,Wei Sun,Congmeng Li,Yihua Chen,Haipeng Xie,Yongli Gao,Yue Ma,Zongyang Peng,Zijian Huang,Ruiyang Yin,Fengtao Pei,Wentao Zhou,Yuetong Wu,Huifen Liu,Kailin Li,Tinglu Song,Dechun Zou,Huachao Zai,Hui Li,Qi Chen,Qian Wang,Huanping Zhou
Metal halide perovskite solar cells (PSCs) have garnered much attention in recent years. Despite the remarkable advancements in PSCs utilizing traditional metal electrodes, challenges such as stability concerns and elevated costs have necessitated the exploration of innovative electrode designs to facilitate industrial commercialization. Herein, a physically and chemically stable molybdenum (Mo) electrode is developed to fundamentally tackle the instability factors introduced by electrodes. The combined spatially resolved element analyses and theoretical study demonstrate the high diffusion barrier of Mo ions within the device. Structural and morphology characterization also reveals the negligible plastic deformation and halide-metal reaction during aging when Mo is in contact with perovskite (PVSK). The electrode/underlayer junction is further stabilized by a thin seed layer of titanium (Ti) to improve Mo film's uniformity and adhesion. Based on a corresponding p–i–n PSCs (ITO/PTAA/PVSK/C 60 /SnO 2 /ITO/Ti/Mo), the champion sample could deliver an efficiency of 22.25%, which is among the highest value for PSCs based on Mo electrodes. Meanwhile, the device shows negligible performance decay after 2000 h operation, and retains 91% of the initial value after 1300 h at 50–60 °C. In summary, the multilayer Mo electrode opens an effective avenue to all-round stable electrode design in high-performance PSCs.
研究领域:
材料科学
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光伏技术
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能源材料
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薄膜技术
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器件物理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）