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In-pixel colour correction with organic self-adaptive transistors 用有机自适应晶体管进行像素内色彩校正
IF 32.9 1区 物理与天体物理 Q1 OPTICS Pub Date : 2026-01-07 DOI: 10.1038/s41566-025-01812-z
Zihan He, Wei Wang, Zepang Zhan, Lingxuan Jia, Yutao Ge, Zitong Zhan, Peiyao Xue, Weijie Wang, Lanyi Xiang, Yingqiao Ma, Yawen Li, Zhiyi Li, Xiaojuan Dai, Dekai Ye, Liyao Liu, Fengjiao Zhang, Ye Zou, Yuze Lin, Xiaowei Zhan, Daoben Zhu, Chong-an Di
Autonomous colour correction embedded into an individual pixel is crucial to create next-generation intelligent visual systems. Although existing feedback circuits enable robust ex situ colour correction, they remain bulky with logic complexity. Here we propose in-pixel colour correction by integrating three panchromatic organic active adaptation transistors as a single pixel, each featuring two complementary broadband bulk heterojunctions. The devices display an active adaptation index, that is, a change in photosensitivity as a function of orders of magnitude changes in luminance, of over 150 to red, green and blue light stimuli. More importantly, the subpixels adapt following the von Kries coefficient law, thereby mimicking the ability of a human visual system to adjust to changes in illumination and preserve the appearance of colours. Our proof-of-concept device array, under distorted light conditions, achieves a recognition accuracy of >96.3% in a convolutional neural network simulation. These results represent a key step for constructing a new generation of smart visual systems with in-sensor functionalities. A colour correction array featuring red-, green- and blue-sensitive organic transistors integrated within a single pixel enables self-adaptive intensity and colour correction.
嵌入单个像素的自主色彩校正对于创建下一代智能视觉系统至关重要。虽然现有的反馈电路可以实现强大的非原位色彩校正,但它们仍然体积庞大,逻辑复杂。在这里,我们提出了像素内色彩校正,通过将三个全色有机有源自适应晶体管集成为单个像素,每个像素具有两个互补的宽带体异质结。该器件显示一个主动适应指数,即光敏度的变化作为亮度变化的函数,超过150的红光,绿光和蓝光刺激。更重要的是,子像素遵循冯·克里系数定律,从而模仿人类视觉系统适应光照变化和保持颜色外观的能力。我们的概念验证设备阵列,在畸变光条件下,在卷积神经网络模拟中实现了96.3%的识别精度。这些结果代表了构建具有传感器内功能的新一代智能视觉系统的关键一步。在单个像素内集成了红、绿、蓝敏感有机晶体管的色彩校正阵列,实现了自适应强度和色彩校正。
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引用次数: 0
Interlayer engineering in metal halide perovskite photovoltaics 金属卤化物钙钛矿光伏的层间工程
IF 32.9 1区 物理与天体物理 Q1 OPTICS Pub Date : 2026-01-06 DOI: 10.1038/s41566-025-01809-8
Seong Sik Shin, Byung-wook Park, Jun Hong Noh, Sang Il Seok
Interlayers (ILs) play a pivotal role in perovskite solar cells, enabling efficient charge extraction, suppressing recombination and enhancing device stability. Positioned between the light-absorbing perovskite layer and the electrodes, ILs facilitate selective carrier transport while mitigating interfacial losses. Unlike GaAs cells and heterojunction with intrinsic thin layer silicon cells, which benefit from coherent, chemically compatible interfaces, perovskite solar cells exhibit structural and energetic mismatches at the interfaces between the perovskite and charge transport layers (CTLs). To address these challenges, functional interfacial ILs are introduced at both the CTL/perovskite and CTL/electrode interfaces. This Review examines the evolution of these ILs, from simple passivation layers to multifunctional components that regulate electric fields and carrier dynamics. We highlight recent advances in materials and architectures, classify ILs by their device position and discuss design strategies inspired by mature photovoltaic technologies. We argue that interfacial IL engineering is crucial to radiative efficiency and stable, high-performance perovskite solar cells. This Review discusses recent advances in interlayer engineering for perovskite solar cells, highlighting promising materials and architectures that could improve the stability and efficiency of devices.
中间层(ILs)在钙钛矿太阳能电池中起着关键作用,可以实现高效的电荷提取,抑制复合和提高器件稳定性。位于光吸收钙钛矿层和电极之间,ILs促进选择性载流子传输,同时减轻界面损失。与砷化镓电池和具有本征薄层硅电池的异质结不同,钙钛矿太阳能电池在钙钛矿和电荷传输层(ctl)之间的界面上表现出结构和能量不匹配。为了解决这些挑战,在CTL/钙钛矿和CTL/电极界面引入了功能界面il。本文综述了这些il的演变,从简单的钝化层到调节电场和载流子动力学的多功能组件。我们重点介绍了材料和架构的最新进展,根据其器件位置对il进行分类,并讨论了受成熟光伏技术启发的设计策略。我们认为界面IL工程对辐射效率和稳定、高性能的钙钛矿太阳能电池至关重要。
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引用次数: 0
Electron shaping for continuous terahertz coverage 连续太赫兹覆盖的电子成形
IF 32.9 1区 物理与天体物理 Q1 OPTICS Pub Date : 2026-01-06 DOI: 10.1038/s41566-025-01829-4
Keigo Kawase, Goro Isoyama
Modulating an electron beam with a frequency-beating laser enables a free-electron laser to generate high-power, narrowband terahertz pulses that can be continuously tuned from 7.8 to 30.8 terahertz.
用跳频激光器调制电子束可以使自由电子激光器产生高功率窄带太赫兹脉冲,这种脉冲可以在7.8到30.8太赫兹之间连续调谐。
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引用次数: 0
Silicon nitride nanocomposites at the buried interface for stable perovskite solar cells 用于稳定钙钛矿太阳能电池的埋藏界面氮化硅纳米复合材料
IF 32.9 1区 物理与天体物理 Q1 OPTICS Pub Date : 2026-01-06 DOI: 10.1038/s41566-025-01819-6
Biao Li, Xingtao Wang, Tianchi Zhang, Weihua Ning, Dongming Zhao, Yong Wang, Xuegong Yu, Deren Yang
Long-term stability of perovskite modules under outdoor conditions remains challenging, hindering their commercialization. Defect evolution driven by charge accumulation is as a key factor deteriorating the performance of perovskite optoelectronic devices. Here we introduce an amorphous (shell)–crystalline (core) silicon nitride (Si3N4) nanocomposite at the buried interface of perovskite solar cells. The composite acts as a nano-cacher that mitigates charge accumulation and suppresses defect evolution. The amorphous shell, with a low density of unsaturated dangling bonds, effectively passivates surface defects of the perovskite film. Simultaneously, the trapping centres within the crystalline Si3N4 core capture accumulated charge carriers during device operation, progressively enhancing the internal electric field. This, in turn, improves charge extraction efficiency and suppresses defect evolution driven by charge accumulation. The resulting perovskite solar cells and minimodules with an area of 10.86 cm2 achieve a power conversion efficiency of 26.65% (certified 26.37%) and 23.17% (certified 22.2%), respectively. Moreover, large perovskite modules (area 1,252 cm2) maintain stable power output over 6 months of outdoor operation. An amorphous–crystalline silicon nitride nanocomposite at the buried interface of perovskite solar cells enables small-area devices with a certified power conversion efficiency of 26.37%. Modules with an area of 1,252 cm2 maintain stable output for 6 months of outdoor operation.
钙钛矿组件在室外条件下的长期稳定性仍然具有挑战性,阻碍了其商业化。电荷积累驱动的缺陷演化是影响钙钛矿光电器件性能的关键因素。在这里,我们在钙钛矿太阳能电池的埋藏界面上引入了一种非晶(壳)-晶(核)氮化硅(Si3N4)纳米复合材料。该复合材料作为纳米缓冲剂,减轻了电荷积累,抑制了缺陷的演化。非晶壳具有低密度的不饱和悬空键,有效地钝化了钙钛矿膜的表面缺陷。同时,晶体Si3N4核心内的俘获中心捕获了器件运行过程中积累的载流子,逐渐增强了内部电场。这反过来又提高了电荷提取效率,抑制了由电荷积累驱动的缺陷演化。所得的钙钛矿太阳能电池和微型组件的面积为10.86 cm2,其功率转换效率分别为26.65%(认证26.37%)和23.17%(认证22.2%)。此外,大型钙钛矿组件(面积1,252 cm2)可在户外运行6个月以上保持稳定的功率输出。在钙钛矿太阳能电池的埋藏界面上制备了一种非晶氮化硅纳米复合材料,使小面积器件具有26.37%的认证功率转换效率。1252 cm2的模块可以在室外运行6个月,保持稳定的产量。
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引用次数: 0
Multiplying matrices in a single pass with light 用光在单个通道中相乘矩阵
IF 32.9 1区 物理与天体物理 Q1 OPTICS Pub Date : 2026-01-06 DOI: 10.1038/s41566-025-01828-5
Carlos A. Ríos Ocampo, Nathan Youngblood
Optical computing has been limited to vector–matrix multiplications, with matrix–matrix operations requiring wavelength- or time-division multiplexing, reducing energy efficiency and speed. Now, researchers have demonstrated a free-space optical approach that overcomes these limitations, enabling parallel matrix–matrix and tensor–matrix multiplications in a single optical operation.
光学计算仅限于矢量矩阵乘法,矩阵矩阵运算需要波长或时分复用,降低了能量效率和速度。现在,研究人员已经展示了一种自由空间光学方法,克服了这些限制,在一次光学操作中实现了并行矩阵-矩阵和张量-矩阵乘法。
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引用次数: 0
Expanded infrared sensitivity 扩大红外灵敏度
IF 32.9 1区 物理与天体物理 Q1 OPTICS Pub Date : 2025-12-29 DOI: 10.1038/s41566-025-01826-7
Anastasiia Vasylchenkova
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引用次数: 0
Photonics looks deeper into biology 光子学更深入地研究生物学
IF 32.9 1区 物理与天体物理 Q1 OPTICS Pub Date : 2025-12-22 DOI: 10.1038/s41566-025-01821-y
Giampaolo Pitruzzello
From super-resolution endoscopes to multi-photon microscopes, photonic technologies are being translated from laboratory innovations to tools for clinical diagnosis and biological inquiry.
从超分辨率内窥镜到多光子显微镜,光子技术正在从实验室创新转化为临床诊断和生物学研究的工具。
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引用次数: 0
Electrically controlled nano-OLED metasurfaces 电控纳米oled超表面
IF 32.9 1区 物理与天体物理 Q1 OPTICS Pub Date : 2025-12-19 DOI: 10.1038/s41566-025-01818-7
Jung-El Ryu, Jeehwan Kim
A nanostencil lithography technique enables fabricating arrays of green-emitting OLEDs with pixels as small as 100 nm and an external quantum efficiency of 13.1%.
纳米模板光刻技术可以制造像素小至100纳米的绿色发光oled阵列,外部量子效率为13.1%。
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引用次数: 0
Low-threshold lasing from colloidal quantum dots under quasi-continuous-wave excitation 准连续波激发下胶体量子点的低阈值激光
IF 32.9 1区 物理与天体物理 Q1 OPTICS Pub Date : 2025-12-15 DOI: 10.1038/s41566-025-01807-w
Donghyo Hahm, Changjo Kim, Tung H. Dang, Valerio Pinchetti, Clément Livache, Victor I. Klimov
Colloidal quantum dots (QDs) are promising materials for the development of solution-processed, colour-selectable lasers. However, most reported QD lasing devices rely on high-power femtosecond lasers as the pump source, which is impractical for technological applications. Here we demonstrate QD lasing using excitation from an electrically modulated (0.1–1% duty cycle), low-power continuous-wave laser diode, achieving lasing at a pump intensity just above 500 W cm−2 at 77 K and 3.6 kW cm−2 at room temperature. This achievement is enabled by type-(I + II) QDs, in which optical gain arises from hybrid direct/indirect biexcitons. These biexcitons exhibit strongly suppressed Auger recombination, resulting in a long optical gain lifetime of several nanoseconds. In addition, owing to fast radiative decay via the direct transition, type-(I + II) QDs exhibit a high material gain of approximately 1,200 cm−1. These properties are crucial for achieving lasing under continuous-wave pumping. Type-(I + II) QDs are also well suited for devices pumped by femtosecond optical pulses, enabling the realization of lasing in fully stacked electroluminescent devices and whispering-gallery-mode lasing in microdisks composed of densely packed QDs. Researchers demonstrate quantum dot lasing using excitation by an electrically modulated (0.1–1% duty cycle), low-power continuous-wave laser diode, achieving lasing at a pump intensity just above 500 W cm−2 at 77 K and 3.6 kW cm−2 at room temperature.
胶体量子点(QDs)是一种很有前途的材料,用于开发溶液加工的、可选颜色的激光器。然而,大多数报道的量子点激光装置依赖于高功率飞秒激光器作为泵浦源,这在技术应用上是不切实际的。在这里,我们演示了使用电调制(0.1-1%占空比)的低功率连续波激光二极管激发的QD激光,在77 K和室温下实现了超过500 W cm - 2的泵浦强度和3.6 kW cm - 2的激光。这一成就是通过-(I + II)型量子点实现的,其中光学增益来自混合直接/间接双激子。这些双激子表现出强烈的抑制俄歇复合,导致光学增益寿命长达几纳秒。此外,由于通过直接跃迁的快速辐射衰减,-(I + II)型量子点表现出大约1200 cm−1的高材料增益。这些特性对于实现连续波泵浦下的激光是至关重要的。类型-(I + II)量子点也非常适合于由飞秒光脉冲泵浦的器件,可以在完全堆叠的电致发光器件中实现激光,也可以在由密集排列的量子点组成的微盘中实现低语通道模式激光。
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引用次数: 0
Light-based catalyst-free conversion of CH4 and CO2 基于光的CH4和CO2的无催化剂转化
IF 32.9 1区 物理与天体物理 Q1 OPTICS Pub Date : 2025-12-09 DOI: 10.1038/s41566-025-01800-3
Jianxin Zhai, Ruo-Ya Wang, Xiao Chen, Baowen Zhou, Zhanghui Xia, Haihong Wu, Teng Xue, Shuaiqiang Jia, Chunjun Chen, Lihong Jing, Mingyuan He, Buxing Han
The photon-mediated conversion of CH4 and CO2 represents a green and sustainable route for producing transportation fuels and chemicals. Here we report an innovative, catalyst-free strategy for the conversion, by light, of CH4 and CO2 into CO/H2 and C2H6. High-energy photons with a wavelength of 185 nm were found to initiate the reaction, and the additional use of photons with different energies at longer wavelengths further improved the reaction efficiency. In particular, the combination of 185-nm and 200–1,100-nm photons enabled CO, H2 and C2H6 production rates of 3.1 mmol m−3 h−1, 1.93 mmol m−3 h−1 and 2.53 mmol m−3 h−1, respectively. Moderate addition of H2O was found to aid the reaction considerably. Moreover, a total gas conversion of 1.51% (24 h) was achieved in experiments simulating an oxygen-free environment. This work opens up a promising route for producing fuels and chemicals using CH4 and CO2 without the use of any catalysts, under ambient conditions. Catalyst-free conversion of methane and carbon dioxide using light of various wavelengths under ambient conditions is reported.
光子介导的CH4和CO2的转化是生产运输燃料和化学品的一种绿色和可持续的途径。在这里,我们报告了一种创新的,无催化剂的策略,通过光,将CH4和CO2转化为CO/H2和C2H6。发现了波长为185 nm的高能光子引发反应,并且在更长的波长上额外使用不同能量的光子进一步提高了反应效率。特别是,185 nm和200 - 1100 nm光子的组合使CO, H2和C2H6的产率分别为3.1 mmol m−3 h−1,1.93 mmol m−3 h−1和2.53 mmol m−3 h−1。适量加入水对反应有很大的促进作用。在模拟无氧环境下,总气体转化率达到1.51% (24 h)。这项工作为在环境条件下使用甲烷和二氧化碳而不使用任何催化剂生产燃料和化学品开辟了一条有前途的途径。
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Nature Photonics
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