Solar Cells: Role of Microstructure in Oxygen Induced Photodegradation of Methylammonium Lead Triiodide Perovskite Films (Adv. Energy Mater. 20/2017)

Sun, Qing; Faßl, Paul; Becker‐Koch, David; Bausch, Alexandra; Rivkin, B. B.; Bai, Sai; Hopkinson, Paul E.; Snaith, Henry J.; Vaynzof, Yana

doi:10.1002/aenm.201770115

Cited by 8 publications

(8 citation statements)

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“…[ 59 ] Under photo‐, thermal‐ and humidity‐ stress, the SCs will gradually degrade due to the surface defects, seriously affecting the long‐term stability of the devices. [ 60–62 ] In previous reports, researchers presented a template‐assisted method for MAPbBr 3 SC microwire‐array‐based PDs to address instability issues, [ 63 ] which inspire the in situ surface modification strategy presented in the work. Figure S11 (Supporting Information) showed the morphological changes of CuPc‐coated MAPbBr 3 SC and bare SC after 60 days (without encapsulation) under a relative humidity of 60–80%.…”

Section: Resultsmentioning

confidence: 99%

In Situ Surface Modification Enables High Stability and Optoelectrical Performance for a Self‐powered Photodetector

Liu

Chen

Huang

et al. 2023

Advanced Optical Materials

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Perovskite single crystals (SCs) have gained significant interest in various applications owing to their superior optoelectrical and physical characteristics as compared to polycrystalline films. However, a considerable portion of incident light is typically reflected at the surface of perovskite SCs, leading to insufficient light absorption within the crystal bulk, ultimately resulting in reduced performance of SC‐based photodetectors. In the present work, an inverted pyramid‐shaped structure is in situ introduced on the surface of an MAPbBr3 SC during the crystal growth process, which can reduce light reflection in the surface region and enhance light absorption of the SC. Additionally, the hydrophobic small molecule copper (II) phthalocyanine (CuPc) is thermally evaporated onto the SC, forming a CuPc/MAPbBr3 heterojunction for the first time. The CuPc/pyramid‐shaped MAPbBr3 heterojunction‐based photodetector exhibits self‐powered characteristics and superior optoelectrical performance, achieving a photocurrent of greater than 10−5 A (10−7 A), a responsiveness of 257 mA W−1 (8.84 mA W−1), and a detection rate of 2.98 × 1012 Jones (1.02 × 1011 Jones) at −2 V (0 V) bias. Simultaneously, the device demonstrates excellent long‐term stability under high humidity conditions, retaining 90.5% of its initial photocurrent even after 60 days in a 60–80% humidity environment.

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Section: Resultsmentioning

confidence: 99%

In Situ Surface Modification Enables High Stability and Optoelectrical Performance for a Self‐powered Photodetector

Liu

Chen

Huang

et al. 2023

Advanced Optical Materials

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“…Furthermore, the stability issue in PSCs also arises from UV and visible radiations but most of these were reported in ambient air condition. [79][80][81] Thus, illumination of light significantly triggers the disintegration caused by moisture and provides additional thermal energies and charges. [82,83] Hence, for PSCs to be stable over time, the need for a superior perovskite layer is imperative and for this, the degradation factor needs to be addressed first.…”

Section: Chronological Work On Stability Of Pscsmentioning

confidence: 99%

Chronological Evolution of Stability in Hybrid Halide Perovskite Solar Cells

Deendyal,

Dhakla,

Taya

et al. 2024

Solar RRL

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Hybrid halide perovskite (HHP) emerged as an excellent material for upcoming photovoltaic technologies owing to its rapid performance growth just within a decade. Extensive research worldwide is going on HHP due to their unique optical properties, flexible thin‐film nature, and simple low‐cost solution‐based fabrication processes for solar cells. Albeit HHP solar cells exhibit adequate power conversion efficiency (PCE), poor stability impedes its commercial deployment. This review summarizes the major efforts made worldwide to improve the stability of HHP‐based solar cells from time to time. Methyl ammonium lead halide (MAPbI3) has been first used in HHP‐based perovskite solar cells (PSCs) but it is more vulnerable to heat and moisture. Further, formamidinium (FA+) and guanidinium (GA+) ion doping have been adopted as a compositional modification for better structural and environmental stability. The entire work has been categorized into three sub‐areas, i.e., MA,; FA, and GA‐based HHP solar cells and the comparison of various photovoltaic parameters of these cells has been presented. Furthermore, the challenges and prospects for PSC research and development toward commercialization have also been presented.

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“…Analogous to moisture‐induced degradation, oxygen‐induced degradation is also initiated at the surface layer and grain boundaries, at which the smaller and more irregular grains are more affected. [ 463 ] A previous study has demonstrated that photoexcitation leads to the formation of superoxide (O 2 − ) through electron transfer to molecular oxygen. Such O 2 − facilitates the deprotonation of the MA + , resulting in the formation of PbI 2 , H 2 O, I 2 , and methylamine (Equation 1).…”

Section: Degradation Mechanism Of Pb‐ Versus Pb‐free Perovskitesmentioning

confidence: 99%

Lead‐Free Halide Perovskite Materials and Optoelectronic Devices: Progress and Prospective

López‐Fernández,

Valli,

Wang

et al. 2023

Adv Funct Materials

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Halide perovskites, in the form of thin films and colloidal nanocrystals, have recently taken semiconductor optoelectronics research by storm, and have emerged as promising candidates for high‐performance solar cells, light‐emitting diodes (LEDs), lasers, photodetectors, and radiation detectors. The impressive optical and optoelectronic properties, along with the rapid increase in efficiencies of solar cells and LEDs, have greatly attracted researchers across many disciplines. However, most advances made so far in terms of preparation (colloidal nanocrystals and thin films), and the devices with highest efficiencies are based on Pb‐based halide perovskites, which have raised concerns over their commercialization due to the toxicity of Pb. This has triggered the search for lower‐toxicity Pb‐free halide perovskites and has led to significant progress in the last few years. In this roadmap review, researchers of different expertise have joined together to summarize the latest progress, outstanding challenges, and future directions of Pb‐free halide perovskite thin films and nanocrystals, regarding their synthesis, optical spectroscopy, and optoelectronic devices, to guide the researchers currently working in this area as well as those that will join the field in the future.

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Solar Cells: Role of Microstructure in Oxygen Induced Photodegradation of Methylammonium Lead Triiodide Perovskite Films (Adv. Energy Mater. 20/2017)

Cited by 8 publications

References 0 publications

In Situ Surface Modification Enables High Stability and Optoelectrical Performance for a Self‐powered Photodetector

In Situ Surface Modification Enables High Stability and Optoelectrical Performance for a Self‐powered Photodetector

Chronological Evolution of Stability in Hybrid Halide Perovskite Solar Cells

Lead‐Free Halide Perovskite Materials and Optoelectronic Devices: Progress and Prospective

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