Chlorine Incorporation in Perovskite Solar Cells for Indoor Light Applications

Kim, Jin-Cheol; Jang, Ji Hun; Choi, Eun Young; Shin, So Jeong; Kim, Ju-Hee; Jeon, Gyeong G.; Lee, Minwoo; Seidel, Jan; Kim, Jong H.; Yun, Jae Sung; Park, Nochang

doi:10.1016/j.xcrp.2020.100273

Cited by 27 publications

(17 citation statements)

References 49 publications

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“…[ 1 ] The role of PV devices is to produce energy and deliver to the Internet of Things devices as per requirement. [ 2–4 ] Recently, Cu 2 ZnSn(S x Se 1– x ) 4 (CZTSSe) and associated compounds which are also known as kesterites receiving growing attention in thin‐film PV sector. [ 5 ] They exhibit favorable optoelectronic properties in addition to containing nontoxic, earth‐abundant, and cheaper elements, which can be used for the development of sustainable PV technologies.…”

Section: Introductionmentioning

confidence: 99%

Suppression of Defects Through Cation Substitution: A Strategic Approach to Improve the Performance of Kesterite Cu₂ZnSn(S,Se)₄ Solar Cells Under Indoor Light Conditions

et al. 2021

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Recent efficiency advancements in kesterites have reinforced the use of Cu2ZnSn(S,Se)4 (CZTSSe) in indoor photovoltaic applications. However, the performance of kesterites under low light intensity conditions is mainly hindered by deep‐level defects. In this study, a strategic approach of silver (Ag) and germanium (Ge) cation substitution to cure these defects are employed. The Ag‐doped CZTSSe (CZTSSe:Ag) and Ge‐doped (CZTSSe:Ge) samples experimentally demonstrated a significant improvement in kesterite device performance under all intensities of LED and white fluorescent lamp conditions are prepared. Interestingly, the CZTSSe:Ag device exhibited the highest performance levels, i.e., 1.2–1.5 and 2.5–3 times better than those of Ge‐doped CZTSSe:Ge and undoped CZTSSe, respectively. This improved device performance is mainly attributed to the reduced energy level of deep‐level defects in CZTSSe:Ag. Moreover, these defects assisted in the generation of a larger potential difference between the grain boundary and grain interior in the CZTSSe:Ag sample, attracting minority carriers near the grain boundary. Consequently, the improved carrier separation process reduced the carrier recombination losses and enhanced the power output under low light intensity conditions. This Ag and Ge cation substitution in kesterite is found to be an effective approach to improve the device performance under low light intensity conditions.

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Section: Introductionmentioning

confidence: 99%

Suppression of Defects Through Cation Substitution: A Strategic Approach to Improve the Performance of Kesterite Cu₂ZnSn(S,Se)₄ Solar Cells Under Indoor Light Conditions

et al. 2021

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“…Hence, in the present study, an attempt has been made to improve the photogenerated charge carriers by reducing the trap sites or density of defects, which is the major hindrance under diffuse low-light condition, by the introduction of naturally extracted graphitic carbon-encapsulated perovskite interface layer. However, this layer not only acts as a HTM but also tends to passivate the active absorber layer to combat the density trap site defects, which will help to achieve higher PCE under low-light diffuse conditions. , Figure a describes the J – V characteristic performances of the fabricated STD, IND, and BLD devices, measured under indoor low-light conditions when simulated using room light LED with the power intensity of ∼200 to 250 lux (0.1 SUN about ∼120 μW/cm 2 ). From the summarized J – V parameters given in Table S3, it is clear that the performance of the interface-modified devices (IND and BLD) is good, holding 20.90 and 13.81%, respectively, when compared to that of the standard device having no interface layers (7.26%).…”

Section: Resultsmentioning

confidence: 99%

Bio-Inspired Graphitic Carbon-Based Large-Area (10 × 10 cm²) Perovskite Solar Cells: Stability Assessments under Indoor, Outdoor, and Water-Soaked Conditions

Pitchaiya

Eswaramoorthy

Ramakrishnan³

et al. 2022

ACS Appl. Mater. Interfaces

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In the emerging photovoltaic (PV) technologies, the golden triangle rule includes higher efficiency, longevity (or stability), and low cost, which are the foremost criteria for the root of commercial feasibility. Accordingly, a unique low-cost, ecofriendly, all-solution-processed, “bio-inspired” graphitic carbon (extracted from the most invasive plant species of Eichhornia crassipes: listed as one of the 100 most dangerous species by the International Union for Conservation of Nature) and a mixed halide perovskite interface-engineered, unique single-cell large-scale (10 × 10 sq.cm with an active area of 88 cm2) carbon-based perovskite solar cell (C-PSC) are demonstrated for the first time, delivering a maximum PCE of 6.32%. Notable performance was observed under low light performance for the interface-engineered champion device fabricated using the layer-to-layer approach, which, even when tested under fluorescent room light condition (at 200 lux of about ∼0.1 SUN illumination), exhibited a significant PCE. In terms of addressing the stability issues in the fabricated PSC devices, the present work has adopted a two-step strategy: the instability toward the extrinsic factors is addressed by encapsulation, and the subsequent intrinsic instability issue is also addressed through interfacial engineering. Surprisingly, when tested under various stability conditions (STC) such as ambient air, light (continuous 1 SUN, under room light illumination (0.1 SUN) and direct sunlight), severe damp up to a depth of ∼25 mm water (cold (∼15 °C) and hot (∼65 °C)), acidic pH (∼5), and alkaline pH (∼11)) conditions, the fabricated large-scale carbon-based perovskite solar cells (C-LSPSCs) retained unexpected long-term stability in their performance for over 50 days. As to appraise the performance superiority of the fabricated C-LSPSC devices under various aforesaid testing conditions, a working model of a mini-fan has been practically powered and demonstrated.

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“…These suggest that excellent PV properties based on device architecture optimized under 1SUN conditions cannot guarantee their excellence under low-intensity light illumination because of reduced photo-generated carriers. 18 Based on these previous studies, PVSCs comprising a planar metal oxide ETL exhibit high power density and iPCE of 121.07 μW/cm 2 and 40.1%, respectively, under a light-emitting diode (LED) lamp with 824.5 Lux. 23 Similar to metal oxide ETLs, interface trap states in organic ETLs should also have a critical effect on the power drop of PVSCs under low-intensity light illumination.…”

Section: ■ Introductionmentioning

confidence: 95%

Strategic Approach for Frustrating Charge Recombination of Perovskite Solar Cells in Low-Intensity Indoor Light: Insertion of Polar Small Molecules at the Interface of the Electron Transport Layer

Shin

Alosaimi

Choi

et al. 2022

ACS Appl. Energy Mater.

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In this study, we propose a strategic interface engineering method for optimizing the power density and power conversion efficiency (PCE) of perovskite solar cells (PVSCs) under low-intensity indoor light conditions. The insertion of a polar bathocuproine (BCP) layer at the electron transport interface significantly improved the photovoltaic properties, in particular, the fill factor and open circuit voltage, in a low-intensity light environment. Based on the systemic characterizations of surface trap states and carrier dynamics using Kelvin probe force microscopy, we revealed that BCP facilitated efficient charge carrier separation and electron extraction under low-intensity light illumination due to surface passivation and dipole-induced suppressed charge recombination. The beneficial role of BCP enabled excellent indoor PCEs of 27.04 and 35.45% under low-intensity light-emitting diode and halogen lights, respectively. Modification of the electron transport layer interface using polar molecules is a simple but highly effective method for optimizing the indoor performance of PVSCs.

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Chlorine Incorporation in Perovskite Solar Cells for Indoor Light Applications

Cited by 27 publications

References 49 publications

Suppression of Defects Through Cation Substitution: A Strategic Approach to Improve the Performance of Kesterite Cu₂ZnSn(S,Se)₄ Solar Cells Under Indoor Light Conditions

Suppression of Defects Through Cation Substitution: A Strategic Approach to Improve the Performance of Kesterite Cu₂ZnSn(S,Se)₄ Solar Cells Under Indoor Light Conditions

Bio-Inspired Graphitic Carbon-Based Large-Area (10 × 10 cm²) Perovskite Solar Cells: Stability Assessments under Indoor, Outdoor, and Water-Soaked Conditions

Strategic Approach for Frustrating Charge Recombination of Perovskite Solar Cells in Low-Intensity Indoor Light: Insertion of Polar Small Molecules at the Interface of the Electron Transport Layer

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Chlorine Incorporation in Perovskite Solar Cells for Indoor Light Applications

Cited by 27 publications

References 49 publications

Suppression of Defects Through Cation Substitution: A Strategic Approach to Improve the Performance of Kesterite Cu2ZnSn(S,Se)4 Solar Cells Under Indoor Light Conditions

Suppression of Defects Through Cation Substitution: A Strategic Approach to Improve the Performance of Kesterite Cu2ZnSn(S,Se)4 Solar Cells Under Indoor Light Conditions

Bio-Inspired Graphitic Carbon-Based Large-Area (10 × 10 cm2) Perovskite Solar Cells: Stability Assessments under Indoor, Outdoor, and Water-Soaked Conditions

Strategic Approach for Frustrating Charge Recombination of Perovskite Solar Cells in Low-Intensity Indoor Light: Insertion of Polar Small Molecules at the Interface of the Electron Transport Layer

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Suppression of Defects Through Cation Substitution: A Strategic Approach to Improve the Performance of Kesterite Cu₂ZnSn(S,Se)₄ Solar Cells Under Indoor Light Conditions

Suppression of Defects Through Cation Substitution: A Strategic Approach to Improve the Performance of Kesterite Cu₂ZnSn(S,Se)₄ Solar Cells Under Indoor Light Conditions

Bio-Inspired Graphitic Carbon-Based Large-Area (10 × 10 cm²) Perovskite Solar Cells: Stability Assessments under Indoor, Outdoor, and Water-Soaked Conditions