Review
Optics
Nannan Feng, Min Lu, Siqi Sun, Anqi Liu, Xiaomei Chai, Xue Bai, Junhua Hu, Yu Zhang
Summary: In recent years, practical engineering applications such as fiber-optic gyroscope, wavelength division multiplexing, and optical coherence tomography have put forward higher requirements on light sources due to the rapid development of military, optical communication, biological imaging, and other fields. Amplified spontaneous emission (ASE) light source has become an excellent candidate due to its advantages such as suitable bandwidth, low coherence, and high power. This review analyzes the principle of the ASE effect, summarizes the optical gain properties of various gain materials and different structural types of electrically pumped ASE devices, and prospects the development of new ASE light-emitting devices integrated with high-gain materials and low-cost structures.
LASER & PHOTONICS REVIEWS
(2023)
Review
Chemistry, Physical
Feisong Qin, Min Lu, Po Lu, Siqi Sun, Xue Bai, Yu Zhang
Summary: Perovskite light-emitting diodes (PeLEDs) show great potential for next-generation display and lighting applications due to their excellent optoelectronic properties. However, a systematic overview of the luminescence and degradation mechanisms is currently lacking. This study provides a detailed discussion of the photophysical processes, electroluminescence mechanism, and device degradation of perovskite materials and PeLEDs. Strategies to improve device performances, including optimization of photoluminescence quantum yield, charge injection and recombination, and light outcoupling efficiency, are also summarized. This work aims to guide future development of PeLEDs and facilitate their industrial applications.
Article
Chemistry, Multidisciplinary
Zhenyang Liu, Yingying Sun, Tong Cai, Hanjun Yang, JinXing Zhao, Tao Yin, Chaoqi Hao, Mingjun Chen, Wenwu Shi, Xiaoxiao Li, Li Guan, Xu Li, Xinzhong Wang, Aiwei Tang, Ou Chen
Summary: This study demonstrates the synthesis of 2D Cs2AgInxBi1-xCl6 alloyed double perovskite nanoplatelets with controlled morphology and composition. The obtained NPLs show unique optical properties and good stability, making them suitable for solution-processing in low-cost device manufacturing. Solution-processed light-emitting diodes using Cs2AgIn0.9Bi0.1Cl6 alloyed double perovskite NPLs as the emitting component exhibit good performance.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Seunghyeon Ji, Sa-Rang Bae, Luhing Hu, Anh Tuan Hoang, Myeong Jin Seol, Juyeong Hong, Ajit Kumar Katiyar, Beom Jin Kim, Duo Xu, Soo Young Kim, Jong-Hyun Ahn
Summary: This study presents a fabrication method for an active-matrix PeLED display, achieved through the heterogeneous integration of perovskite light-emitting diodes with MoS2 TFTs. The display exhibits excellent brightness control capability and high switching speed, showcasing the potential of PeLEDs as candidates for next-generation displays.
ADVANCED MATERIALS
(2023)
Review
Nanoscience & Nanotechnology
Jae Hong Jang, Shi Li, Dae-Hyeong Kim, Jiwoong Yang, Moon Kee Choi
Summary: The flexible displays that can change their shape freely have attracted significant attention in the field of human-friendly mobile electronics. Perovskite-based LEDs are also gaining popularity due to their exceptional optical characteristics. This review discusses the recent advances in flexible PeLEDs, including their materials, device structures, research progress, application examples, and future prospects.
ADVANCED ELECTRONIC MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Nan Li, Yongheng Jia, Yuwei Guo, Ni Zhao
Summary: This paper systematically discusses ion-related issues in PeLEDs, including the material and processing origins of ion generation, the mechanisms driving ion migration, characterization approaches for probing ion distributions, the effects of ion migration on device performance and stability, and strategies for ion management. The remaining challenges and future opportunities in this field are highlighted.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Jianxun Lu, Xiang Guan, Yuqing Li, Kebin Lin, Wenjing Feng, Yaping Zhao, Chuanzhong Yan, Mingliang Li, Yueyue Shen, Xiangqian Qin, Zhanhua Wei
Summary: This paper proposes managing charge injection and recombination behavior in CsSnI3-based Pero-LEDs by tuning the interface area of perovskite and charge-transporter. By utilizing a dendritic CsSnI3 structure, efficient lead-free NIR Pero-LEDs are achieved with a record external quantum efficiency of 5.4%. The dendritic structure also shows superiorities in flexible devices, maintaining almost no morphology change even after 2000 cycles of bends, and retaining 93.4% of initial EQEs after 50 cycles of bends.
ADVANCED MATERIALS
(2021)
Review
Chemistry, Multidisciplinary
Lingmei Kong, Xiaoyu Zhang, Chengxi Zhang, Lin Wang, Sheng Wang, Fan Cao, Dewei Zhao, Andrey L. Rogach, Xuyong Yang
Summary: Metal halide perovskites exhibit excellent electronic and optical properties, making them attractive for low-cost, large-area processing in optoelectronics. However, achieving stability and spectral stability remains a challenge. This review explores the origins of instability in perovskite materials and strategies for improving stability, as well as methods to enhance operational stability in perovskite LEDs.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
De-Sheng Liu, Jiang Wu, Hongxing Xu, Zhiming Wang
Summary: The information explosion era is driving the development of large-bandwidth high-data-rate optical interconnection technology. The lack of efficient light sources has been a major hurdle in optical interconnections, but 2D materials and metal halide perovskites have emerged as promising candidates with distinctive advantages. Recent progress in light-emitting materials, including Ge-on-Si, III-V-on-Si lasers, and advancements in 2D and perovskite materials for photonic integration, are discussed in this report. Challenges and future prospects of these emerging materials in the development of efficient light sources are also addressed.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Ayato Arai, Hisahiro Sasabe, Kohei Nakao, Yuki Masuda, Junji Kido
Summary: In this study, by designing and developing benzothienocarbazole-based host materials, the pi conjugation of the carbazole unit was expanded to enhance OLED lifetime. The new material m1BTCBP demonstrated higher performance compared to mCBP, with an operational luminescence half-life of 300 hours.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Review
Chemistry, Physical
Keyu Wei, Bing Liang, Changjiu Sun, Yuanzhi Jiang, Mingjian Yuan
Summary: This review summarizes the structural and photophysical properties of metal halide perovskites (MHPs), with a focus on red-emission perovskites. It outlines the recently emerged optical property modulation methods for high-quality red-emission perovskite films, and summarizes approaches to optimizing electronics properties and extending the operational lifetime of red-emission PeLEDs. Finally, it offers an outlook on the future challenges and potential directions for red-emission PeLEDs.
Article
Chemistry, Multidisciplinary
Siyu Yan, Wanli Tian, Hua Chen, Kaixin Tang, Tingting Lin, Gaoyu Zhong, Longzhen Qiu, Xiaoyong Pan, Weizhi Wang
Summary: Lead-based perovskite light-emitting diodes (PeLEDs) exhibit excellent performance, while in order to develop more environmentally friendly perovskite materials, researchers have developed a novel manganese-based organic-inorganic hybrid perovskite with superior performance and stability compared to other lead-free PeLEDs.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Zong-Liang Tseng, Lung-Chien Chen, Li-Wei Chao, Meng-Ju Tsai, Dian Luo, Nurul Ridho Al Amin, Shun-Wei Liu, Ken-Tsung Wong
Summary: In recent years, the performance and efficiency of perovskite quantum dots and QD-based light-emitting diodes have greatly improved, but the development of near-infrared QLEDs lags behind. In this study, new near-infrared-emissive perovskite quantum dots were developed through post-treatment, achieving high photoluminescence quantum yield and preparing high-quality films suitable for highly efficient near-infrared QLED applications.
ADVANCED MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Shi-Chi Feng, Xin-Mei Hu, Yang Shen, Yan-Qing Li, Jian-Xin Tang, Shuit-Tong Lee
Summary: Quasi-2D perovskites have gained significant attention in high-quality displays for their superior optoelectronic properties compared to 3D counterparts. The n-value distribution of quasi-2D perovskites has a strong impact on the electroluminescence efficiency and stability of perovskite light-emitting diodes (PeLEDs). This review provides an introduction to the crystal structure, formation mechanism, and multiple-quantum-well characteristics of quasi-2D perovskites, as well as a comprehensive summary of mainstream strategies for regulating the phase distribution to improve PeLED performance.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Seo Yeon Kim, Hungu Kang, Kiseok Chang, Hyo Jae Yoon
Summary: By utilizing self-assembled monolayers (SAMs) for interfacial engineering, the quality and optoelectronic properties of perovskite films can be enhanced, leading to improved efficiency and spectral performance of LEDs.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Qin Yao, Yue-Min Xie, Yingzhi Zhou, Qifan Xue, Xin Xu, Yujia Gao, Tianqi Niu, Linghao Chu, Zhisheng Zhou, Francis R. Lin, Alex K. -Y. Jen, Tingting Shi, Hin-Lap Yip, Yong Cao
Summary: This study uses an ionic liquid, methylammonium acetate (MAAc), and bathocuproine (BCP) to modify wide-bandgap perovskite sub-cells and small-bandgap organic solar cells. MAAc effectively heals the defects in the perovskite film, improving the energy conversion efficiency, while BCP acts as a space layer to prevent direct contact between ZnO and the organic bulk-heterojunction, mitigating efficiency loss. The integration of these modified sub-cells enables the fabrication of monolithic n-i-p structured tandem solar cells with a maximum PCE of 22.43%.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Chemistry, Physical
Osbel Almora, Derya Baran, Guillermo C. Bazan, Carlos I. Cabrera, Sule Erten-Ela, Karen Forberich, Fei Guo, Jens Hauch, Anita W. Y. Ho-Baillie, T. Jesper Jacobsson, Rene A. J. Janssen, Thomas Kirchartz, Nikos Kopidakis, Maria A. Loi, Richard R. Lunt, Xavier Mathew, Michael D. McGehee, Jie Min, David B. Mitzi, Mohammad K. Nazeeruddin, Jenny Nelson, Ana F. Nogueira, Ulrich W. Paetzold, Barry P. Rand, Uwe Rau, Henry J. Snaith, Eva Unger, Lidice Vaillant-Roca, Chenchen Yang, Hin-Lap Yip, Christoph J. Brabec
Summary: This article summarizes the best achievements in the performance of emerging photovoltaic devices in various research subjects, as reported in peer-reviewed articles since August 2021. The article provides updated graphs, tables, and analyses of performance parameters, and compares them based on the photovoltaic bandgap energy and average visible transmittance. The scope of the report is expanded to include triple junction solar cells.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Tong Wang, Thomas R. Hopper, Navendu Mondal, Sihui Liu, Chengning Yao, Xijia Zheng, Felice Torrisi, Artem A. Bakulin
Summary: Transition metal dichalcogenides (TMDs) have excellent semiconductor properties, making them promising materials for next-generation optoelectronic and electronic devices. Recent studies have reported the ultrafast carrier cooling rate in TMDs and the slowing effect by hot-phonon bottleneck (HPB) at high excitation densities. However, quantitative descriptions of HPB in TMDs and the effects of carrier-carrier interactions on cooling are still lacking. In this study, using femtosecond pump-push-probe spectroscopy, the scattering of hot carriers with optical phonons, cold carriers, and defects in a benchmark TMD monolayer of polycrystalline WS2 is systematically characterized.
Article
Chemistry, Multidisciplinary
Ben P. Carwithen, Thomas R. Hopper, Ziyuan Ge, Navendu Mondal, Tong Wang, Rozana Mazlumian, Xijia Zheng, Franziska Krieg, Federico Montanarella, Georgian Nedelcu, Martin Kroll, Miguel Albaladejo Siguan, Jarvist M. Frost, Karl Leo, Yana Vaynzof, Maryna I. Bodnarchuk, Maksym V. Kovalenko, Artem A. Bakulin
Summary: In this study, the relaxation of hot carriers in lead halide perovskites (LHPs) and the role of quantum confinement in nanosystems were examined. Ultrafast pump-push-probe spectroscopy was used to study carrier cooling in different size-controlled LHP nanomaterials. The results showed that dimensional confinement has a significant impact on carrier-phonon and carrier-carrier interactions, highlighting its potential for engineering LHP optoelectronic materials.
Article
Chemistry, Multidisciplinary
Baobing Fan, Wenkai Zhong, Wei Gao, Huiting Fu, Francis R. Lin, Reese W. -Y. Wong, Ming Liu, Chenhui Zhu, Cheng Wang, Hin-Lap Yip, Feng Liu, Alex K. -Y. Jen
Summary: Sequentially deposited organic solar cells (SD-OSCs) have received great attention due to their ability to achieve a more favorable morphology. However, the processing of SD-OSCs is challenging in preventing the penetration of small-molecule acceptors into the polymer donor layer. In this study, solid additives with varied electrostatic potential distributions and steric hinderance are introduced to investigate their effect on vertical component distribution.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Leyu Bi, Qiang Fu, Zixin Zeng, Yunfan Wang, Francis R. Lin, Yuanhang Cheng, Hin-Lap Yip, Sai Wing Tsang, Alex K. -Y. Jen
Summary: In this study, the roles of chloride-based additives and methylammonium-based additives in inverted FAPbI3-based perovskite solar cells were systematically investigated. It was found that these additives have different effects on the crystallization and phase transition of FAPbI3. By optimizing the amount of MACl, the highest efficiency of inverted FAPbI3-based perovskite solar cells was achieved.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Baobing Fan, Wei Gao, Rui Zhang, Werner Kaminsky, Francis R. Lin, Xinxin Xia, Qunping Fan, Yanxun Li, Yidan An, Yue Wu, Ming Liu, Xinhui Lu, Wen Jung Li, Hin-Lap Yip, Feng Gao, Alex K. -Y. Jen
Summary: Organic photovoltaics (OPVs) have made significant progress recently, thanks to the use of well-designed non-fullerene acceptors (NFAs) with conjugated side-groups. Researchers have developed a new class of NFAs with localisomerized conjugated side-groups and studied their impact on device performance and stability. A device based on one of the isomers achieved an impressive efficiency of 18.5% and exhibited excellent photo- and thermal stability. A similar approach was applied to another polymer donor, resulting in an even higher efficiency of 18.8%. This work highlights the effectiveness of local isomerization in enhancing the photovoltaic performance and stability of OPVs based on fused ring NFAs.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Shuang-Qiao Sun, Xiuwen Xu, Qi Sun, Qin Yao, Yating Cai, Xin-Yi Li, Yan-Lin Xu, Wei He, Min Zhu, Xuan Lv, Francis R. Lin, Alex K. -Y. Jen, Tingting Shi, Hin-Lap Yip, Man-Keung Fung, Yue-Min Xie
Summary: This study develops a dual-interface engineering approach to improve the performance of all-inorganic wide-bandgap CsPbI2Br-based front sub-cells in perovskite/organic tandem solar cells (POTSCs). By mitigating the defects and carrier recombination induced by interface defects and perovskite grain boundaries, the CsPbI2Br-based front sub-cells achieve a high power conversion efficiency (PCE) of 17.0% and open-circuit voltage (V-OC) of 1.347 V. Furthermore, by integrating these dual-interface engineered front sub-cells with narrow-bandgap PM6:CH1007-based rear sub-cells, a record PCE of 23.21% is obtained for the POTSCs.
ADVANCED ENERGY MATERIALS
(2023)
Review
Chemistry, Physical
Yue-Min Xie, Qin Yao, Hin-Lap Yip, Yong Cao
Summary: Wide-bandgap perovskite sub-cells (WPSCs)-based tandem solar cells have attracted significant interest due to their ability to surpass the Shockley-Queisser limit. Monolithic perovskite/organic tandem solar cells (POTSCs) integrating WPSCs and small-bandgap organic sub-cells (SOSCs) are popular due to their simple fabrication method and compatibility with flexible devices. This study reviews existing p-i-n type WPSC-based p-i-n POTSCs and n-i-p type WPSC-based n-i-p POTSCs, highlighting their advantages and limitations, and discusses the influence of tandem device component properties on photovoltaic performance and existing device modification methods.
Article
Materials Science, Multidisciplinary
Shien-Ping Feng, Yuanhang Cheng, Hin-Lap Yip, Yufei Zhong, Patrick W. K. Fong, Gang Li, Annie Ng, Cong Chen, Luigi Angelo Castriotta, Fabio Matteocci, Luigi Vesce, Danila Saranin, Aldo Di Carlo, Puqun Wang, Jian Wei Ho, Yi Hou, Fen Lin, Armin G. Aberle, Zhaoning Song, Yanfa Yan, Xu Chen, Yang (Michael) Yang, Ali Asgher Syed, Ishaq Ahmad, Tiklun Leung, Yantao Wang, JingYang Lin, Alan Man Ching Ng, Yin Li, Firouzeh Ebadi, Wolfgang Tress, Giles Richardson, Chuangye Ge, Hanlin Hu, Masoud Karimipour, Fanny Baumann, Kenedy Tabah, Carlos Pereyra, Sonia R. Raga, Haibing Xie, Monica Lira-Cantu, Mark Khenkin, Iris Visoly-Fisher, Eugene A. Katz, Yana Vaynzof, Rosario Vidal, Guicheng Yu, Haoran Lin, Shuchen Weng, Shifeng Wang, Aleksandra B. Djurisic
Summary: Perovskite solar cells (PSCs) are highly promising in terms of power conversion efficiency, but commercialization still faces unresolved problems and obstacles. This article provides a concise summary of outstanding issues, challenges, and progress made in addressing them, offering expert viewpoints across various topics related to PSC commercialization. It aims to serve as a valuable resource for researchers in the field and facilitate discussions to overcome the outstanding challenges in this fast-developing area.
JOURNAL OF PHYSICS-MATERIALS
(2023)
Review
Nanoscience & Nanotechnology
Lixiu Zhang, Luyao Mei, Kaiyang Wang, Yinhua Lv, Shuai Zhang, Yaxiao Lian, Xiaoke Liu, Zhiwei Ma, Guanjun Xiao, Qiang Liu, Shuaibo Zhai, Shengli Zhang, Gengling Liu, Ligang Yuan, Bingbing Guo, Ziming Chen, Keyu Wei, Aqiang Liu, Shizhong Yue, Guangda Niu, Xiyan Pan, Jie Sun, Yong Hua, Wu-Qiang Wu, Dawei Di, Baodan Zhao, Jianjun Tian, Zhijie Wang, Yang Yang, Liang Chu, Mingjian Yuan, Haibo Zeng, Hin-Lap Yip, Keyou Yan, Wentao Xu, Lu Zhu, Wenhua Zhang, Guichuan Xing, Feng Gao, Liming Ding
Summary: Recently, there has been a surge in research on metal halide perovskite materials due to the significant improvement in the photovoltaic performance of perovskite solar cells. The exceptional optoelectronic properties and defect tolerance of metal halide perovskite make it suitable for various applications. This article provides a comprehensive review of the current progress and future prospects of metal halide perovskite materials in different applications including traditional optoelectronic devices and cutting-edge technologies such as neuromorphic devices and pressure-induced emission. The review highlights the fundamental knowledge, current progress, and challenges in each application, aiming to provide an overview of the development status and future research directions for metal halide perovskite materials and devices.
NANO-MICRO LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Ben P. Carwithen, Thomas R. Hopper, Ziyuan Ge, Navendu Mondal, Tong Wang, Rozana Mazlumian, Xijia Zheng, Franziska Krieg, Federico Montanarella, Georgian Nedelcu, Martin Kroll, Miguel Albaladejo Siguan, Jarvist M. Frost, Karl Leo, Yana Vaynzof, Maryna I. Bodnarchuk, Maksym V. Kovalenko, Artem A. Bakulin
Summary: This study investigates the carrier cooling process in size-controlled lead halide perovskite nanomaterials using ultrafast pump-push-probe spectroscopy. The results show that there is only a weak size effect on the cooling dynamics in cuboidal nanocrystals, while the hot phonon bottleneck effect commonly observed in bulk perovskites is suppressed in two-dimensional systems.
Article
Chemistry, Multidisciplinary
Tong Wang, Thomas R. Hopper, Navendu Mondal, Sihui Liu, Chengning Yao, Xijia Zheng, Felice Torrisi, Artem A. Bakulin
Summary: Transition metal dichalcogenides (TMDs) have potential applications in next-generation optoelectronic and electronic devices due to their outstanding semiconducting properties. However, there is still a lack of detailed understanding of the carrier cooling mechanisms in TMDs.
