Over 17% Efficiency Stand‐Alone Solar Water Splitting Enabled by Perovskite‐Silicon Tandem Absorbers

Karuturi, Siva Krishna; Shen, Heping; Sharma, Astha; Beck, Fiona J.; Varadhan, Purushothaman; Narangari, Parvathala Reddy; Zhang, Doudou; Wan, Yimao; He, Jr‐Hau; Tan, Hark Hoe; Jagadish, Chennupati; Catchpole, Kylie

doi:10.1002/aenm.202000772

Cited by 65 publications

(65 citation statements)

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“…Many unique and intriguing properties, including broad and tunable absorption, high luminescence quantum yield, and superior charge transport properties, make them attractive for advanced photovoltaic and optoelectronic devices. [101][102][103] Although studies on the properties of low-dimensional MHPs are fewer compared with those on their bulk counterparts, their rich chemistry and fascinating properties are now being gradually discovered. In this part, we focus on the basic concepts and recent advances in the study of their optical properties.…”

Section: Optical Propertiesmentioning

confidence: 99%

Low‐Dimensional Metal Halide Perovskite Photodetectors

et al. 2020

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Metal halide perovskites (MHPs) have been a hot research topic due to their facile synthesis, excellent optical and optoelectronic properties, and record‐breaking efficiency of corresponding optoelectronic devices. Nowadays, the development of miniaturized high‐performance photodetectors (PDs) has been fueling the demand for novel photoactive materials, among which low‐dimensional MHPs have attracted burgeoning research interest. In this report, the synthesis, properties, photodetection performance, and stability of low‐dimensional MHPs, including 0D, 1D, 2D layered and nonlayered nanostructures, as well as their heterostructures are reviewed. Recent advances in the synthesis approaches of low‐dimensional MHPs are summarized and the key concepts for understanding the optical and optoelectronic properties related to the PD applications of low‐dimensional MHPs are introduced. More importantly, recent progress in novel PDs based on low‐dimensional MHPs is presented, and strategies for improving the performance and stability of perovskite PDs are highlighted. By discussing recent advances, strategies, and existing challenges, this progress report provides perspectives on low‐dimensional MHP‐based PDs in the future.

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Section: Optical Propertiesmentioning

confidence: 99%

Low‐Dimensional Metal Halide Perovskite Photodetectors

et al. 2020

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“…The slow increase in the photocurrent after switching upon light illumination is proposed to trigger the migration of bromide aroused by the irradiation of the hybrid perovskites, which, in turn, reduces the density of trap states of perovskite crystals. [ 24 ] This might also be responsible for the slow increase in photocurrent in our photocathode devices.…”

Section: Figurementioning

confidence: 99%

Facile Fabrication of Hybrid Perovskite Single‐Crystalline Photocathode for Photoelectrochemical Water Splitting

Zhang

Yang

et al. 2021

Energy Tech

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Recently, beyond various optoelectronic devices, lead halide perovskites have emerged as promising candidates for high‐performance photocatalysts owing to their excellent optoelectronic properties. However, most previous works on perovskite photocatalysts mainly used the forms of nanocrystals that need the perovskite‐saturated electrolyte or polycrystalline thin films that still suffer from the instability in water and low performance. Herein, the synthesis of high‐quality hybrid perovskite single crystals and their implementation as photocathodes for water splitting with a simple device structure are reported on. Optimized perovskite crystals exhibit a good water splitting photocurrent density of −0.51 mA cm−2 at 0 V versus reversible hydrogen electrode (RHE) under visible light illumination. Moreover, such devices as the p‐type photocathodes show improved stability, exhibiting no obvious decrease over 600 s. This work highlights the great potential of hybrid perovskite single crystals for photocatalyst applications in aqueous solution.

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“…[2c, 6] Among them, silicon materials and silicon based devices have been used to fabricate photocathodes for PEC solar-to-hydrogen conversion with significant progress as summarized in the review articles by our group and others. [6,7] So far,most results were reported based on crystalline silicon (c-Si) [8] due to its narrow band gap and high apparent photocurrent density up to 30-40 mA cm À2 . [8,9] However,low photovoltage output (less than half of 1.23 V, the minimum required voltage for water splitting) is the intrinsic drawback of c-Si which needs to be overcome by combining with other materials.…”

Section: Introductionmentioning

confidence: 99%

Hole‐Storage Enhanced a‐Si Photocathodes for Efficient Hydrogen Production

Zhang

Wang

et al. 2021

Angew Chem Int Ed

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Ferrihydrite (Fh) has been demonstrated as an effective interfacial layer for photoanodes to achieve outstanding photoelectrochemical (PEC) performance for water oxidation reaction owing to its unique hole‐storage function. However, it is unknown whether such a hole‐storage layer can be used to construct highly efficient photocathodes for hydrogen evolution reaction (HER). In this work, we report Fh interfacial engineering of amorphous silicon photocathode (with nickel as HER cocatalyst) achieving a photocurrent density of 15.6 mA cm−2 at 0 V vs. the reversible hydrogen electrode and a half‐cell energy conversion efficiency of 4.08 % in alkaline solution, outperforming most of reported a‐Si based photocathodes including multi‐junction configurations integrated with noble metal cocatalysts in acid solution. Besides, the photocurrent density is maintained above 14 mA cm−2 for 175 min with 100 % Faradaic efficiency for HER in alkaline solution. Our results demonstrate a feasible approach to construct efficient photocathodes via the application of a hole‐storage layer.

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Over 17% Efficiency Stand‐Alone Solar Water Splitting Enabled by Perovskite‐Silicon Tandem Absorbers

Cited by 65 publications

References 50 publications

Low‐Dimensional Metal Halide Perovskite Photodetectors

Low‐Dimensional Metal Halide Perovskite Photodetectors

Facile Fabrication of Hybrid Perovskite Single‐Crystalline Photocathode for Photoelectrochemical Water Splitting

Hole‐Storage Enhanced a‐Si Photocathodes for Efficient Hydrogen Production

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