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Interfacial Voids Trigger Carbon-Based, All-Inorganic Cs Pb IBr2 Perovskite Solar Cells with photovoltage Exceeding 1.33 V

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Nano-Micro Letters 2020年第7期12卷 121-134页

作者： Weidong Zhu Zeyang Zhang Dandan Chen Wenming Chai Dazheng Chen Jincheng Zhang Chunfu Zhang Yue Hao State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology and Shaanxi Joint Key Laboratory of Graphene School of MicroelectronicsXidian UniversityXi’an 710071People’s Republic of China College of Science Xi’an Shiyou UniversityXi’an 710065ShaanxiPeople’s Republic of China

A novel interface design is proposed for carbon-based,all-inorganic CsPbIBr2 perovskite solar cells(PSCs)by introducing interfacial voids between TiO2 electron transport layer and CsPbIBr2 *** with the general interfacial engineering strategies,this design exempts any extra modification layer in final *** importantly,the interfacial voids produced by thermal decomposition of 2-phenylethylammonium iodide trigger three beneficial e ***,they promote the light scattering in CsPbIBr2 film and thereby boost absorption ability of the resulting CsPbIBr2 ***,they suppress recombination of charge carriers and thus reduce dark saturation current density(J0)of the ***,interfacial voids enlarge built-in potential(Vbi)of the PSCs,awarding increased driving force for dissociating photo-generated charge ***,the PSC yields the optimized e ciency of 10.20%coupled with an open-circuit voltage(Voc)of 1.338 *** Voc achieved herein represents the best value among CsPbIBr2 PSCs reported ***,the non-encapsulated PSCs exhibit an excellent stability against light,thermal,and humidity stresses,since it remains^97%or^94%of its initial e ciency after being heated at 85℃for 12 h or stored in ambient atmosphere with relative humidity of 30–40%for 60 days,respectively.

关键词： All-inorganic perovskite solar cells Cs Pb IBr2 photovoltage Interfacial engineering Stability

High-sensitivity photovoltage based on the interfacial photoelectric effect in the SrTiO_(3-δ)/Si heterojunction

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Science China(Physics,Mechanics & Astronomy) 2010年第11期53卷 2080-2083页

作者： WEN Juan 1,GUO HaiZhong 1,XING Jie 2,Lü HuiBin 1,JIN Kui-Juan 1,HE Meng 1 & YANG GuoZhen 1 1 Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China 2 School of Materials Sciences and Technology,China University of Geosciences,Beijing 100083,China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing China School of Materials Sciences and Technology China University of Geosciences Beijing China

A high sensitivity photovoltaic effect has been observed in a heterojunction composed of n-type wide bandgap oxide SrTiO 3-δ and p-type Si fabricated by laser molecular beam *** responsivity of open-circuit photovoltage can reach 10 4 V/W without any amplification under zero bias for the wavelength range from visible to near infrared light in nW-μW *** attribute the high performance of the photovoltage responsivity to the interfacial photoelectric effects in the SrTiO 3-δ /Si *** the experimental results,some ideas can be generalized to improve photovoltaic efficiency and develop high sensitivity photodetectors with wide bandgap oxide materials and Si.

关键词： SrTiO 3-δ/Si heterojunction interfacial photoelectric effect photovoltage

Double-peaked decay of transient photovoltage in nanoporous ZnO/n-Si photodetector

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Science China(Physics,Mechanics & Astronomy) 2014年第6期57卷 1206-1208页

作者： LIU Hao FU Cheng ZHAO Kun State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum Key Laboratory of Oil and Gas Terahertz Spectroscopy and Photoelectric Detection China Petroleum and Chemical Industry Federation(CPCIF)

In the present work,a nanoporous ZnO/n-Si structure has been proposed as a new type infrared *** by one laser pulse with wavelength of 1064 nm,this structure exhibits a double-peak decay of transient ***,the time interval between these two peaks increases linearly with the increase of irradiated pulsed energy,indicating the promising application of this hetero-junction in photo-energy detection of infrared pulsed laser.A possible mechanism for this particular photoresponse has been discussed.

关键词： ZnO sol-gel photovoltage photodetector

STUDIES　OF　SURFACE　photovoltage　PROPERTIES　AND　CHARGE　TRANSFER　ON　TRANSITION　METAL　PORPHYRIN　COMPLEX　　（Ⅰ）　

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Chinese Chemical Letters 1995年第3期6卷 251-254页

作者： Jie ZHANG De Jun WANG Tong Shun SHI Peng ZHANG Xi Zhang CAO Tie Jin LI(Department of Chemistry, Jilin University, Changchun 130023) Jilin Univ Dept Chem Changchun 130023 Peoples R China

photovoltage properties and charge transfer process of tailed porpbyrin Mn(Ⅲ) complex. meso-mono-|o-(4-diethylamino) butyramidophenyl| triphenyl porphyrin Mn(Ⅲ) (MDBPTPPMn(Ⅲ)Cl) were investigated by surface photovoltage spectrum (SPS)and field modulation surface photovoltage spectrum (FMSPS). Furthermore, its absorption spectra in near-ultraviolet and near-infrared that have been disputed are given a new assignment in this paper.

关键词： SURFACE TRANSITION COMPLEX METAL OF photovoltage PORPHYRIN PROPERTIES STUDIES AND

Vacuum Sensitivity of photovoltage of AlGaAs/GaAsMultiple Quantum Wells

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Semiconductor Photonics and Technology 1997年第1期3卷 14-19,34页

作者： ZHUWenzhang SHENQihuz JimeiNavigationInstitute Xiamen361021CHN XamenUniversity Xiamen361005CHN

Abstract: The photovoltage spectra of AlGaAs/GaAs multiple quantum wells at different vacuum have been measured and the vacuum sensitivity of photovoltage is re-ported. The experimental results show that the photovoltage decreases in a step - like manner at 105 Pa and increases in a sept - like manner at 0.1 Pa. It is believed that the variation of photovoltage with vacuum is due to the action of oxygen atoms adsorbing at the surface of AlGaAs/GaAs multiple quantum wells structure.

关键词： Quantum Well photovoltage Vacuum

A Study on Synthesis and Surface photovoltage Spectrum of Palladium Tetraethyl-tetramethylporphyrin and Feasilibity of Phosphorescence Manometry

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High Technology Letters 1998年第2期4卷 88-92页

作者：汪进

A static optical pressure measurement system and the synthesis of Palladium tetraethyl tetramethyl porphyrin(PdTETMP) are investigated in this paper. UV visible spectrum, surface photovoltage spectrum of PdTETMP and oxygen quenching phosphorescence of PdTETMP are determined. The results indicate that the photovoltaic respons of PdTETMP decrease as the partial pressure of oxygen rises, which is similar to oxgyen quenching of the phosphorescence of PdTETMP. The data shows, as predicted by Stem Volmer relationship I 0/I=A+Bp/p 0, that a nearly linear relationship between I 0/I versus p/p 0 and the intercept A and slope B are 0.32, 0.67, respectively.

关键词： Synthesis Tetraethyl tetramethylporphyrin Surface photovoltage spectra UV Vis absorption spectra Phosphorescence pressure measurement system

A multifunctional optical-thermal logic gate sensor array based on ferroelectric BiFeO_(3) thin films

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InfoMat 2023年第5期5卷 111-120页

作者： Li Wu Yun Ji Huiyu Dan Chris RBowen Ya Yang CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijingthe People's Republic of China Center on Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanningthe People's Republic of China Department of Mechanical Engineering University of BathBathUK

The growing need to process a diverse range of data has ignited effort in developing new multifunctional logic gate *** this article,we report a new form of all-in-one logic gate system that exploits the photoresponsivity of a self-powered multifunctional BiFeO_(3)(BFO)sensor *** BFO sensor can not only detect both light intensity and temperature,but it can also execute three common logic gates of“AND”,“OR”,and“NOT”by converting optical and thermal inputs into electrical *** diverse functionality of the BFO logic gate sensor array utilizes the unique light-and temperaturecontrolled energy band structure and carrier behavior of the BFO *** demonstrate the potential,a 3×3 logic gate sensor matrix is developed,which successfully detected light and temperature distributions,and accurately produced the three basic logic gate *** work provides a new route to construct highly integrated multifunctional electronic devices for the advancement of large sensing,communication,and computing operations.

关键词： BiFeO_(3) logic gate optical-thermal photocurrent photovoltage

Reducing energy loss via tuning energy levels of polymer acceptors for efficient all-polymer solar cells

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Science China Chemistry 2020年第12期63卷 1785-1792页

作者： Huiliang Sun Bin Liu Jianwei Yu Xianshao Zou Guangye Zhang Yujie Zhang Wei Zhang Mengyao Su Qunping Fan Kun Yang Jianhua Chen He Yan Feng Gao Xugang Guo Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Department of Physics Chemistry and Biology(IFM)Linköping UniversityLinköping SE-58183Sweden eFlexPV Limited Flat/RM B12/FHang Seng Causeway Bay BLDGCauseway BayHong KongChina Division of Chemical Physics Lund University Box 12422100 LundSweden Department of Chemistry and Chemical Engineering Chalmers University of TechnologyGöteborg SE-41296Sweden School of Advanced Materials Peking University Shenzhen Graduate SchoolPeking UniversityShenzhen 518055China School of Physics and Electronic Engineering Guangzhou UniversityGuangzhou 510006China Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration&Reconstruction The Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina

The open-circuit voltage(Voc) of all-polymer solar cells(all-PSCs) is typically lower than 0.9 V even for the most efficient *** energy loss is the main reason for limiting Voc and efficiency of all-PSCs. Herein, through materials design using electron deficient building blocks based on bithiophene imides, the lowest unoccupied molecular orbital(LUMO) energy levels of polymer acceptors can be effectively tuned, which resulted in a reduced energy loss induced by charge generation and recombination loss due to the suppressed charge-transfer(CT) state absorption. Despite a negligible driving force, all-PSC based on the polymer donor and acceptor combination with well-aligned energy levels exhibited efficient charge transfer and achieved an external quantum efficiency over 70% while maintaining a large Voc of 1.02 V, leading to a 9.21% efficiency. Through various spectroscopy approaches, this work sheds light on the mechanism of energy loss in all-PSCs, which paves an avenue to achieving efficient all-PSCs with large Voc and drives the further development of all-PSCs.

关键词： all-polymer solar cells polymer acceptors energy level modulation photovoltage energy loss

Gate-dependent photoresponse in self-assembled graphene p–n junctions

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Chinese Physics B 2015年第6期24卷 603-606页

作者：尹伟红王玉冰韩勤杨晓红 State Key Laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of Science

The intrinsic photocurrent generation mechanism of a self-assembled graphene p-n junction operating at 1.55 ~tm is investigated experimentally. It is concluded that both a photovoltage effect and a photothermoelectric effect contribute to the final photocurrent. The photocurrent signal at the p-n junction was found to be dominated by photothermoelectric current, arising from different self-assembled doping levels.

关键词： graphene photodetector photovoltage photothermoelectric