Control of Surface Defects in ZnO Nanorod Arrays with Thermally Deposited Au Nanoparticles for Perovskite Photovoltaics

Tulus, .; Olthof, Selina; Marszałek, Magdalena; Peukert, Andreas; Muscarella, Loreta A.; Ehrler, Bruno; Vukovic, Olivera; Galagan, Yulia; Boehme, Simon C.; Hauff, Elizabeth von

doi:10.1021/acsaem.9b00452

Cited by 24 publications

(19 citation statements)

References 70 publications

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“…However, this is complicated by the fact that halide perovskites tend to react with metals and metal oxides 47,48 without suitable functionalization. 49 Therefore, to maximize both FF and Voc, future work should focus on optimizing the conductivity of the transport layer, while minimizing chemical reactivity and interfacial recombination.…”

Section: Routes Towards Finding Selective Transport Layers In Perovsk...mentioning

confidence: 99%

Pitfalls and prospects of optical spectroscopy to characterize perovskite-transport layer interfaces

Hutter

Kirchartz

Ehrler

et al. 2020

Applied Physics Letters

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Perovskite photovoltaics has witnessed an unprecedented increase in power conversion efficiency over the last decade. The choice of transport layers, through which photo-generated electrons and holes are transported to electrodes, is a crucial factor for further improving both the device performance and stability. In this perspective, we critically examine the application of optical spectroscopy to characterize the quality of the transport layer-perovskite interface. We highlight the power of complementary studies that use both continuous wave and time-resolved photoluminescence to understand non-radiative losses and additional transient spectroscopies for characterizing the potential for loss-less carrier extraction at the solar cell interfaces. Based on this discussion, we make recommendations on how to extrapolate results from optical measurements to assess the quality of a transport layer and its impact on solar cell efficiency.

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Section: Routes Towards Finding Selective Transport Layers In Perovsk...mentioning

confidence: 99%

Pitfalls and prospects of optical spectroscopy to characterize perovskite-transport layer interfaces

Hutter

Kirchartz

Ehrler

et al. 2020

Applied Physics Letters

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“…Growth techniques can control the surface defects. However, survey of state-of-the-art review has shown that not much work has been done in order to understand the role of growth techniques in controlling the surface/interface defects. − A proper control over the surface/interface defect states is indeed necessary for practical application of ZnO nanostructures in broadband photodetection. In conjunction with the photoconductivity measurement, we have made a careful analysis of the broad visible emission in the photoluminescence (PL) spectra which is associated with different types of defects.…”

Section: Introductionmentioning

confidence: 99%

Surface/Interface Defect Engineering on Charge Carrier Transport toward Broadband (UV-NIR) Photoresponse in the Heterostructure Array of p-Si NWs/ZnO Photodetector

Samanta

Ghatak

Raychaudhuri

et al. 2023

ACS Appl. Electron. Mater.

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The surface/interface properties, especially interfacial states, have a key impact on overall carrier generation, recombination/transport, and/or collection proficiency for heterostructurebased photodetectors. This study demonstrates the significant enhancement of ultraviolet−near infrared (UV-NIR) (300−1100 nm) broadband photodetection in the heterostructure array of p-Si NWs/ZnO photodetectors with engineering of surface/interface charge carrier transportation under different processing conditions. In the case of a pulsed laser deposition (PLD)-grown photodetector, coupling of the subsidiary value of the defect state with the interfacial layer (Si−O−Zn) at the p−n junction reduces the charge carrier recombination, resulting in a large enhancement of transient photocurrent in the visible (Vis)−NIR region. However, in the case of a chemical solution deposition (CSD)-grown photodetector, plenty of oxygen vacancies (V o s) become the trap-assisted recombination centers by capturing of photoinduced carriers. The average value of responsivity (R) at 1 V bias for the PLD-grown detector is ∼5.5 A/W in the Vis−NIR (500−1100 nm) region, whereas in the UV region (≤375 nm), the value of R reached ∼8 A/ W. The value of R in the PLD-grown detector is enhanced ∼10 2 folds in the UV region and ∼20 folds in the Vis−NIR region in comparison with the CSD-grown detector. Further, carrier generation, trapping, and transport/recombination processes in the surface/interface are well illustrated to explain the dynamics of the charge carrier contributing to the photoresponse behavior in the UV-NIR broadband region.

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“…[30][31][32][33][34] It has been proven that the deprotonation of the methylammonium cation and the formation of zinc hydroxide accelerate the perovskite decomposition. [35,36] To overcome this obstacle, the ZnO/perovskite interface instability can be mitigated by the interface passivation of the ZnO surface with various org anic [33,34,37,38,39,[40][41][42] or inorganic [14,[43][44][45][46][47][48] modification layers, and doping of ZnO bulk with metal heteroatoms. [49][50][51] In the latter case, aluminum (Al) doping not only enhances the stability of the ZnO/perovskite interface by decreasing the basic property of ZnO [52] but also greatly improves its carrier concentration and electron mobility.…”

Section: Introductionmentioning

confidence: 99%

Atomic Layer Engineering of Aluminum‐Doped Zinc Oxide Films for Efficient and Stable Perovskite Solar Cells

Kruszyńska

Ozkaya

Surucu

et al. 2022

Adv Materials Inter

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promising light absorber materials, demon strating low-cost solution processing, ease of fabrication, and outstanding optoelectronic properties. [1,2] Since the first report on the perovskite solar cells (PSCs) employing methylammonium lead iodide (MAPbI 3 ), [3] their power conversion efficiency (PCE) has now exceeded 25% for small-area cells. [4,5] The high efficiency of PSCs is achieved by tuning the perovskite layer through compositional engineering, [6][7][8] surface passivation, [9][10][11][12][13] and/or by using various additives. [14][15][16] Besides component engineering of the perovskite layer, a lot of works have been devoted to the development of efficient charge transport layers. [17][18][19][20][21] Particularly, the electron transport layers (ETLs) play an important role in realizing efficient and stable PSCs. [22,23] Thus far, titanium dioxide (TiO 2 ) is a widely applied ETL in PSCs but it suffers from low conductivity and high surface defect density. [24] Among alternative ETLs, zinc oxide (ZnO) has been regarded as a convenient candidate due to its high electron mobility and well-matched energy level with perovskite material. [25,26] This Atomic layer deposition (ALD) has been considered as an efficient method to deposit high quality and uniform thin films of various electron transport materials for perovskite solar cells (PSCs). Here, the effect of deposition sequence in the ALD process of aluminum-doped zinc oxide (AZO) films on the performance and stability of PSCs is investigated. Particularly, the surface of AZO film is terminated by diethylzinc (DEZ)/H 2 O (AZO-1) or trimethylaluminum (TMA)/H 2 O pulse (AZO-2), and investigated with surface-sensitive X-ray photoelectron spectroscopy technique. It is observed that AZO-2 significantly enhances the thermal stability of the upcoming methylammonium lead iodide (MAPbI 3 ) layer and facilitates charge transport at the interface as evidenced by photoluminescence spectroscopes and favorable interfacial band alignment. Finally, planar-type PSC with AZO-2 layer exhibits a champion power conversion efficiency of 18.09% with negligible hysteresis and retains 82% of the initial efficiency after aging for 100 h under ambient conditions (relative humidity 40 ± 5%). These results highlight the importance of atomic layer engineering for developing efficient and stable PSCs.

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Control of Surface Defects in ZnO Nanorod Arrays with Thermally Deposited Au Nanoparticles for Perovskite Photovoltaics

Cited by 24 publications

References 70 publications

Pitfalls and prospects of optical spectroscopy to characterize perovskite-transport layer interfaces

Pitfalls and prospects of optical spectroscopy to characterize perovskite-transport layer interfaces

Surface/Interface Defect Engineering on Charge Carrier Transport toward Broadband (UV-NIR) Photoresponse in the Heterostructure Array of p-Si NWs/ZnO Photodetector

Atomic Layer Engineering of Aluminum‐Doped Zinc Oxide Films for Efficient and Stable Perovskite Solar Cells

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