ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xuanling Liu,Han Zhong,Xuanyu Wang,Jianfei Yang,Ziling Zhang,Jianhua Han,Dan Oron,Hong Lin
Regulating strain in perovskite films via utilizing the crystal structure relationship between solid-phase materials (SPMs) and perovskite is an effective method to achieve high-performance perovskite solar cells. It is crucial to investigate and manipulate the heterointerfaces between perovskites and SPMs since the mismatched crystal structure and energy band structure of SPMs will bring recombination sites to the heterointerfaces. In this work, CdS-modified PbS nanosheets (CPS) were prepared through cation exchange with (200)-preferred PbS nanosheets. The wide-band gap CdS charge-blocking layer of CPS nanosheets distributed at the grain boundaries effectively passivates the heterointerfaces in FAPbI3-CPS heterostructures (FAPI-CPS). Further, it potentially blocks carrier transportation and suppresses carrier recombination at grain boundaries and in FAPbI3-PbS nanosheet heterointerfaces. Attributed to the CdS layer, the FAPI-CPS devices achieve an enhanced power conversion efficiency. CPS nanosheets with an interplanar spacing slightly smaller than that of α-FAPbI3 could provide compressive strain to FAPbI3 at the FAPI-CPS heterointerfaces, leading to significantly improved device stability. The unencapsulated FAPI-CPS solar cells maintained 92% of their initial PCE after being stored at 20 ± 5 °C, 20 ± 5% RH for 2500 h.
研究领域:
材料科学
·
能源技术
·
物理化学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2019
·Vol. 30
·期 4
·1907379
·
IF 15.621
Yong Xia,Sisi Liu,Kang Wang,Xiaokun Yang,Linyuan Lian,Zhiming Zhang,Jungang He,Guijie Liang,Song Wang,Manlin Tan,Haisheng Song,Daoli Zhang,Jianbo Gao,Jiang Tang,Matthew C. Beard,Jianbing Zhang
Infrared solar cells that utilize low-bandgap colloidal quantum dots (QDs) are promising devices to enhance the utilization of solar energy by expanding the harvested photons of common photovoltaics into the infrared region. However, the present synthesis of PbS QDs cannot produce highly efficient infrared solar cells. Here, a general synthesis is developed for low-bandgap PbS QDs (0.65–1 eV) via cation exchange from ZnS nanorods (NRs). First, ZnS NRs are converted to superlattices with segregated PbS domains within each rod. Then, sulfur precursors are released via the dissolution of the ZnS NRs during the cation exchange, which promotes size focusing of PbS QDs. PbS QDs synthesized through this new method have the advantages of high monodispersity, ease-of-size control, in situ passivation of chloride, high stability, and a “clean” surface. Infrared solar cells based on these PbS QDs with different bandgaps are fabricated, using conventional ligand exchange and device structure. All of the devices produced in this manner show excellent performance, showcasing the high quality of the PbS QDs. The highest performance of infrared solar cells is achieved using ≈0.95 eV PbS QDs, exhibiting an efficiency of 10.0% under AM 1.5 solar illumination, a perovskite-filtered efficiency of 4.2%, and a silicon-filtered efficiency of 1.1%.
研究领域:
材料科学
·
纳米技术
·
光伏技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2023
·
IF 6.4
Huaxiao Xie,Pan Deng,Zhentao Zhou,Heng Xiong,Xiumin Chen,Bin Yang,Baoqiang Xu,Huan Yang,Chaosong Meng,Xiaohui Wei
An important way to obtain PbS and FeS is the thermal decomposition of Jamesonite. However, the mechanism of PbS–FeS interaction is unknown. In order to explore the separation effect of PbS and FeS, thermodynamic calculation, dynamic simulation and vacuum distillation experiments were used to explore the interaction mechanism of PbS and FeS. The decomposition and volatilization temperatures of PbS and FeS were obtained by thermodynamic calculation. The difference of saturated vapor pressure indicates that there is a tendency of separation between them. The ab initio molecular dynamics method was used to calculate the density of states of PbS and FeS at different temperatures, indicating that the FeS(114) structure is more stable than the PbS(200) structure, and the Pb–S bond is easier to break than the Fe–S bond at the same temperature. The experimental results of vacuum distillation show that the volatilization temperature of PbS is much lower than that of FeS, and FeS can only volatilize into the gas phase at a higher temperature. The theoretical calculation method is consistent with the experimental results, which shows that the thermodynamic calculation and dynamic simulation methods are reliable in predicting the volatilization and separation of crystal structures. The interaction mechanism between PbS and FeS was explored from the theoretical point of view to provide theoretical guidance for vacuum distillation experiment.
研究领域:
矿物学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RAMAN SPECTROSCOPY
·
2019
·Vol. 50
·期 10
·1445-1451
·
IF 2.809
Aili Liu,Huile Jin,Jun Li,Liyun Chen,Haoyuan Zheng,Xinnan Mao,Dajie Lin,Jichang Wang,Shun Wang,Weizhong Jiang
A microwave- and ultrasound-assisted reduction and assembly of lead dimethyldithiocarbamate (Pb (DMDC) 2 ) led to the formation of rod-like Pb (DMDC) 2 embedded with PbS quantum dots (QDs). Transmission electron microscopy measurements show the presence of numerous isolated PbS QDs on the Pb (DMDC) 2 microrod surface, which may potentially act as hot spots for enhanced Raman spectroscopy. A case study using mercaptopyridine as the analyte demonstrates that the rod-like hybrids have outstanding performance as a surface-enhanced Raman scattering (SERS) substrate, comparable with that of Au nanorods. The excellent SERS performance of the as-fabricated PbS QDs/Pb (DMDC) 2 hybrids may be attributed to the unique dispersion of PbS QDs as well as the intimate contacts between PbS QDs and Pb (DMDC) 2 . This study therefore presents a new approach for the development of low-cost and highly efficient semiconductor-based SERS substrates.
研究领域:
材料科学
·
光谱学
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2017
·
IF 12.343
Xiaolu Zheng,Hongwei Lei,Guang Yang,Weijun Ke,Zhiliang Chen,Cong Chen,Junjie Ma,Quanbing Guo,Fang Yao,Qi Zhang,Hongxing Xu,Guojia Fang
Although the perovskite solar cells (PSCs) based on organic hole transport materials (HTMs) have demonstrated excellent photovoltaic performance , there are still some obstacles that limiting their future commercialization , one of which is the device stability. Herein, we first report that depositing a (200) orientated PbS thin film upon organic HTMs as buffer layer can significantly enhance the stability and improve the performance of PSCs. The superior hole extraction efficiency of spiro-OMeTAD/PbS bilayer can balance the charge transfer and the hydrophobic nature of PbS could avoid the permeation of moisture. As a result, the PSCs with PbS buffer layer exhibited a better photovoltaic performance (a champion power conversion efficiency of 19.58%) with respect to the reference cells (18.79%), and maintained almost 100% of its initial PCE after 1000 h stored in ambient air. Furthermore, when suffer from some more severe conditions, the device with PbS retained 56% of its initial PCE after 96 h annealing at 85 °C, while only 25% for the reference cells. Our results provide a simple method to avoid the weakness of organic HTMs, and suggest that PbS thin film could be an alternative buffer layer material in PSCs to simultaneously improve the device stability and photovoltaic performance.
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
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Xiaokun Yang,Ji Yang,Muhammad Irfan Ullah,Yong Xia,Guijie Liang,Song Wang,Jianbing Zhang,Hsien-Yi Hsu,Haisheng Song,Jiang Tang
Solution-processed semiconductors have opened promising avenues for next-generation semiconductor and optoelectronic industries. Colloidal quantum dots (QDs) as one of the most typical materials are widely utilized for the design and development of light-emitting diodes, photodetectors, and solar cells. Recently, an emerging process of PbS QD ink has been employed to attain world record power conversion efficiency by surface passivation using a PbI2 ligand to form PbI2–PbS and the process optimization in the field of photovoltaics. However, the bonding and debonding of the ligands on the surface of PbS QDs are dynamic reversible processes in an ink environment. The uncoordinated Pb2+ defects induced by unbonded PbS QDs serve as the recombination sites. Thus, the present ink process leaves much room for the enhancement by surface passivation of PbS QDs. Herein, we devise an efficient strategy with a supplementary phenethylammonium iodide (PEAI) ligand for the formation of the PEAI–PbS interface in PbS QD ink-processed solar cells. This newly developed method can not only improve the passivation on the QD surface by iodine ions but also simultaneously enhance the carrier collection efficiency by a graded energy alignment between PbI2–PbS and PEAI–PbS layers. The corresponding power conversion efficiency of the optimized device has significantly increased by approximately 20% more than the control device. As a result, such a robust and efficient method regarded as a strategic candidate can overcome the bottleneck of imperfect passivation caused by a large specific surface area and loose bonding ligands, eventually promoting the industrial application of QDs.
研究领域:
材料科学
·
光伏技术
·
纳米科技
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2025
·
IF 4.2
Yu Lu,Zhixu Wu,Pengfei Xiang,Taiming Ji,Rongxin Tang,Yuhao Wang,Yong Xia
Lead sulfide (PbS) colloidal quantum dots (CQDs) are widely used for infrared detection and imaging. Currently, the most popular device structures for PbS CQDs photodetectors (PDs) are p-i-n type. Among them, the PbS CQDs films treated with 1,2-ethanedithiol (EDT) are extensively utilized as hole transport layers. However, the energy band alignment based on the PbS-EDT layer has a great impact on the device performance and has not been thoroughly investigated. To systematically explore the effect of the bandgap of PbS-EDT layer on device performance, this work is firstly based on the PbS-EDT layer simulated through SCAPS-1D software. When the PbS-EDT layer bandgap is 1.4 eV, the device can build a suitable gradient energy band structure and the dark current density (J dark ) reaches the lowest. Based on the simulation results, the corresponding PbS CQDs PDs were fabricated, which showed excellent performance with the J dark of 265 nA/cm 2 at a bias voltage of −0.5V, the responsivity and specific detectivity reached 0.65 A/W and 5.73 × 10 12 Jones, respectively. A single-element scanning infrared imaging system demonstrates the excellent imaging capability of the device. The energy band alignment strategy based on the PbS-EDT layer is expected to promote infrared optoelectronic applications in this field.
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
CHINESE JOURNAL OF POLYMER SCIENCE
·
2019
·Vol. 38
·期 3
·298-310
·
IF 2.804
Feng Cong-Shu,Chen Yun,Shao Jun,Li Gao,Hou Hao-Qing
In this study, the poly(D-lactide)-block-poly(butylene succinate)-block-poly(D-lactide) (PDLA- b -PBS- b -PDLA) triblock copolymers with a fixed length of PBS and various lengths of PDLA are synthesized, and the crystallization behaviors of the PDLA and PBS blocks are investigated. Although both the crystallization behaviors of PBS and PDLA blocks depend on composition, they exhibit different variations. For the PDLA block, its crystallization behaviors are mainly influenced by temperature and block length. The crystallization signals of PDLA block appear in the B-D 2–2 specimen, and these signals get enhanced with PDLA block length. The crystallization rates tend to decrease with increasing PDLA block lendth during crystallizing at 90 and 100 °C. Crystallizing at higher temperature, the crystallization rates increase at first and then decrease with block length. The crystallization rates decrease as elevating the crystallization temperature. The melting temperatures of PDLA blocks increase with block lengths and crystallization temperatures. For the PBS block, its crystallization behaviors are mainly controlled by the nucleation and confinement from PDLA block. The crystallization and melting enthalpies as well as the crystallization and melting temperatures of PBS block reduce as a longer PDLA block has been copolymerized, while the crystallization rates of the PBS block exhibit unique component dependence, and the highest rate is observed in the B-D 2–2 specimen. The Avrami exponent of PBS crystallites is reduced as a longer PDLA block is incorporated or the sample is crystallized at higher temperature. This investigation provides a convenient route to tune the crystallization behavior of PBS and PLA.
研究领域:
高分子化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Optical Materials
·
2025
·
IF 3.8
Xi Ran,Hang Xia,Jing Liu,Mohan Yuan,Xudong Hu,Ya Wang,Xinzheng Lan
Lead sulfide (PbS) colloidal quantum dot (CQD) photodetectors are promising devices for low-cost, high-performance, and large-area infrared imaging. For integration with readout integrated circuits (ROICs), top illumination is urgently required to ensure simultaneous light absorption and signal acquisition. However, the traditional best-performing p-on-n PbS CQD photodetectors rely on opaque top metal contacts, thus limiting the development of top-illuminated imagers. Herein, we addressed this issue by introducing a bifunctional ZnTe layer. The presence of the ZnTe layer─while allowing efficient hole collection─serves as a protective layer for the CQD layer during subsequent transparent electrode deposition. The resultant PbS CQD photodetectors based on the ZnTe layer show a specific detectivity of 2.09 × 1012 Jones at ≈1300 nm, representing approximately a 5-fold improvement over the control device (4.30 × 1011 Jones). This performance is comparable to that of the best PbS CQD photodetectors reported at similar wavelengths. The advantages of this architecture are further demonstrated by building a PbS CQD imager with a pixel array of 256 × 256, verifying the compatibility of photodetectors with ROICs.
研究领域:
光电子学
·
纳米技术
·
红外成像
·
半导体器件
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
VACUUM
·
2022
·
IF 4.11
Zhaowang Dong,Ling Li,Heng Xiong,Ganggang Liu,Yizhao Wang,Zhentao Zhou,Baoqiang Xu,Bin Yang
In this paper, the modified molecular interaction volume model (M-MIVM) was used to calculate the activities of components of the PbS–Sb 2 S 3 binary matte system. On this basis, the vapor-liquid equilibrium (VLE) data of the PbS–Sb 2 S 3 system were calculated by M-MIVM in combination with the theory of vacuum metallurgy and VLE. Additionally, the VLE experiment of the PbS–Sb 2 S 3 binary matte system was conducted to correctly interpret the results of the model. The calculated results of the VLE of the model were consistent with the experimental values, and the VLE calculation of the PbS–Sb 2 S 3 binary matte system by M-MIVM was reliable. This is an effective and convenient method to predict the relationship between product components with temperature and pressure in vacuum distillation of PbS and Sb 2 S 3 mixed melts, providing theoretical guidance for vacuum separation and purification of PbS and Sb 2 S 3 .
研究领域:
冶金工程
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2013
·Vol. 17
·期 11
·2909-2915
·
IF 2.279
Zhang Jing Bo,Zhao Fei Yan,Tang Guang Shi,Lin Yuan
PbS electrode with high catalytic activity to S n
2− reduction certificated by the measurements of electrochemical impedance spectroscopy and cyclic voltammetry was prepared by a simple method. The high catalytic activity makes it be a low-cost alternative counter electrode to platinum (Pt) to be used in quantum dots-sensitized solar cells (QDSSCs) based on polysulfide electrolyte. The photovoltaic performance enhancement of the quantum dots (QDs)-sensitized semiconductor thin films due to the PbS counter electrode was evaluated by fabricating QDSSCs based on CdSe QDs-sensitized ZnO (SnO 2 ) thin film. CdSe QDs-sensitized ZnO thin film has the lower internal total series resistance and electron transmission time, the higher electron lifetime and electron collection efficiency than the CdSe QDs-sensitized SnO 2 thin film. Replacing the Pt counter electrode with the PbS counter electrode leads to more improvement on the short circuit photocurrent density for QDSSC based on the ZnO thin film than the SnO 2 thin film. Therefore, the process to limit the photovoltaic performance of CdSe QDs-sensitized solar cell and the possible way to improve the photovoltaic performance were analyzed.
研究领域:
材料科学
·
能源技术
·
光电化学
✓ 已验证
产品关联
DOI
高影响因子
Colloids and Interfaces
·
2025
·Vol. 9
·期 4
·49
·
IF 3.2
Qian Lei,Lei Rao,Wencan Deng,Xiuqin Ao,Fan Fang,Wei Chen,Jiaji Cheng,Haodong Tang,Junjie Hao
Lead sulfide colloidal quantum dots (PbS QDs) have demonstrated great potential in short-wave infrared (SWIR) photodetectors due to their tunable bandgap, low cost, and broad spectral response. While significant progress has been made in surface ligand modification and defect state passivation, studies focusing on the interface between QDs and electrodes remain limited, which hinders further improvement in device performance. In this work, we propose an interface engineering strategy based on 3-aminopropyltriethoxysilane (APTES) to enhance the interfacial contact between PbS QD films and ITO interdigitated electrodes, thereby significantly boosting the overall performance of SWIR photodetectors. Experimental results demonstrate that the optimal 0.5 h APTES treatment duration significantly enhances responsivity by achieving balanced interface passivation and charge carrier transport. Moreover, The APTES-modified device exhibits a controllable dark current and faster photo-response under 1310 nm illumination. This interface engineering approach provides an effective pathway for the development of high-performance PbS QD-based SWIR photodetectors, with promising applications in infrared imaging, spectroscopy, and optical communication.
研究领域:
纳米技术
·
光电子学
·
材料科学
·
半导体器件
✓ 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）