- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Realizing Stable Artificial Photon Energy Harvesting Based on Perovskite Solar Cells for Diverse Applications
摘要： As the fastest developing photovoltaic device, perovskite solar cells have achieved an extraordinary power conversion efficiency (PCE) of 25.3% under AM 1.5 illumination. However, few studies have been devoted to perovskite solar cells harvesting artificial light, owing to the great challenge in the simultaneous manipulation of bandgap-adjustable perovskite materials, corresponding matched energy band structure of carrier transport materials, and interfacial defects. Herein, through systematic morphology, composition, and energy band engineering, high-quality Cs0.05MA0.95PbBrxI3?x perovskite as the light absorber and NbyTi1?yO2 (Nb:TiO2) as the electron transport material with an ideal energy band alignment are obtained simultaneously. The theoretical-limit-approaching record PCEs of 36.3% (average: 34.0 ± 1.2%) under light-emitting diode (LED, warm white) and 33.2% under fluorescent lamp (cold white) are achieved simultaneously, as well as a PCE of 19.5% (average: 18.9 ± 0.3%) under solar illumination. An integrated energy conversion and storage system based on an artificial light response solar cell and sodium-ion battery is established for diverse practical applications, including a portable calculator, quartz clock, and even environmental monitoring equipment. Over a week of stable operation shows its great practical potential and provides a new avenue to promote the commercialization of perovskite photovoltaic devices via integration with ingenious electronic devices.
关键词： energy band engineering,weak light harvesting,perovskite solar cells,indoor application
更新于2025-09-19 17:13:59
-
Multifunctional Photocatalytic Materials for Energy || Energy band engineering of metal oxide for enhanced visible light absorption
摘要： Since the 1970s, when it was discovered that TiO2 could split water and reduce CO2 [1,2], the pursuit has continued to produce solar fuels via renewable sunlight, by mimicking photosynthesis. However, doing so remains one of the major scientific challenges. This process requires both efficient light absorption and effective charge carrier transfer for chemical reactions. For commercial applications, long-term stability is also a prerequisite. Many catalysts have been reported for this exciting process [3–6]. In practice, metal oxide semiconductors are the most abundant ones in nature, and they are more stable in a variety of harsh conditions when used as photocatalysts [7–12]. Regarding the energetic criteria, only wide band gap semiconductors (e.g., TiO2 and SrTiO3) are thermodynamically able to drive water splitting without applied external bias. However, the wide band gap of such oxides limits their light absorption within the ultraviolet region. Some oxides, such as Fe2O3 (Eg = 2.0 eV), have advantages for absorbing visible light, but suffer from high electron affinities and poor charge carrier mobility and diffusion [13–15].
关键词： Energy band engineering,photocatalysis,visible light absorption,metal oxide,solar fuels
更新于2025-09-10 09:29:36