scholarly journals Pulsatile therapy for perovskite solar cells

2021 ◽  
Author(s):  
Mansoo Choi ◽  
Kiwan Jeong ◽  
Junseop Byeon ◽  
Jihun Jang ◽  
Namyoung Ahn
Keyword(s):  
Solar Cells ◽  
Reverse Bias ◽  
Defect Formation ◽  
Perovskite Solar Cells ◽  
Steady Increase ◽  
Point Tracking ◽  
Hybrid Perovskite ◽  
Pl Intensity ◽  
Power Point

Abstract Although photovoltaics employing hybrid perovskite halides have continuously been breaking world- records of power conversion efficiency (PCE) and expectations for their industrialization are rapidly rising, long-term stability issue that has greatly hampered the commercialization of perovskite solar cells has not been resolved yet. Ion instability and trapped charges were suggested as a fundamental reason for perovskite device degradation. Here, we report a pulsatile therapy relieving the accumulation of both trapped charges and ions in the perovskite solar cell device during the middle of maximum power point tracking (MPPT) for reviving the device and prolonging its device lifetime. In the technique, reverse biases are repeatedly applied for a very short time to eliminate the charges accumulated and re-distribute the ions migrated during power harvesting without any pause of operation. Intriguingly, the therapy is not only delaying irreversible degradation, but also, restoring the degraded power right after a short reverse bias. In-situ photoluminescence (PL) and photocurrent (PC) measurements for the working device were done while applying the pulsatile therapy for studying the underlying physics. Time evolving PL intensity and PC not only revealed the steady increase of PL intensity during the therapy indicating the reduction of non-radiative recombination, but also strikingly showed the restoration of degraded PL intensity and PC right after a short reverse bias suggesting the device healing. In the long-term test, we observed outstanding improvement of device stability and total harvesting power. A model considering trap-assisted recombination has also been developed to explain the efficacy of the therapy based on defect formation during MPPT operation and defect healing by the pulsatile therapy. The unique technique will open up new possibility to commercialize perovskite materials into a real market.

scholarly journals Chemical anti-corrosion strategy for stable inverted perovskite solar cells

2020 ◽  
Vol 6 (51) ◽  
pp. eabd1580
Author(s):  
Xiaodong Li ◽  
Sheng Fu ◽  
Wenxiao Zhang ◽  
Shanzhe Ke ◽  
Weijie Song ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Electrochemical Corrosion ◽  
Metal Electrodes ◽  
Maximum Power Point ◽  
Perovskite Layer ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Organic Corrosion Inhibitor ◽  
Power Point

One big challenge for long-lived inverted perovskite solar cells (PSCs) is that commonly used metal electrodes react with perovskite layer, inducing electrode corrosion and device degradation. Motivated by the idea of metal anticorrosion, here, we propose a chemical anticorrosion strategy to fabricate stable inverted PSCs through introducing a typical organic corrosion inhibitor of benzotriazole (BTA) before Cu electrode deposition. BTA molecules chemically coordinate to the Cu electrode and form an insoluble and polymeric film of [BTA-Cu], suppressing the electrochemical corrosion and reaction between perovskite and the Cu electrode. PSCs with BTA/Cu show excellent air stability, retaining 92.8 ± 1.9% of initial efficiency after aging for 2500 hours. In addition, >90% of initial efficiency is retained after 85°C aging for over 1000 hours. PSCs with BTA/Cu also exhibit good operational stability, and 88.6 ± 2.6% of initial efficiency is retained after continuous maximum power point tracking for 1000 hours.

scholarly journals An antibonding valence band maximum enables defect-tolerant and stable GeSe photovoltaics

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Shun-Chang Liu ◽  
Chen-Min Dai ◽  
Yimeng Min ◽  
Yi Hou ◽  
Andrew H. Proppe ◽  
...  
Keyword(s):  
Solar Cells ◽  
Valence Band ◽  
Surface Passivation ◽  
Defect Density ◽  
Perovskite Solar Cells ◽  
Valence Band Maximum ◽  
Ambient Conditions ◽  
Band Maximum ◽  
Point Tracking ◽  
Power Point

AbstractIn lead–halide perovskites, antibonding states at the valence band maximum (VBM)—the result of Pb 6s-I 5p coupling—enable defect-tolerant properties; however, questions surrounding stability, and a reliance on lead, remain challenges for perovskite solar cells. Here, we report that binary GeSe has a perovskite-like antibonding VBM arising from Ge 4s-Se 4p coupling; and that it exhibits similarly shallow bulk defects combined with high stability. We find that the deep defect density in bulk GeSe is ~1012 cm−3. We devise therefore a surface passivation strategy, and find that the resulting GeSe solar cells achieve a certified power conversion efficiency of 5.2%, 3.7 times higher than the best previously-reported GeSe photovoltaics. Unencapsulated devices show no efficiency loss after 12 months of storage in ambient conditions; 1100 hours under maximum power point tracking; a total ultraviolet irradiation dosage of 15 kWh m−2; and 60 thermal cycles from −40 to 85 °C.

scholarly journals Is Cu a stable electrode material in hybrid perovskite solar cells for a 30-year lifetime?

2016 ◽  
Vol 9 (12) ◽  
pp. 3650-3656 ◽  
Author(s):  
Jingjing Zhao ◽  
Xiaopeng Zheng ◽  
Yehao Deng ◽  
Tao Li ◽  
Yuchuan Shao ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electrode Material ◽  
Perovskite Solar Cells ◽  
Term Stability ◽  
Long Term Stability ◽  
Hybrid Perovskite

Here we explored the potential of using copper as the electrode material for long-term stability of perovskite solar cells.

scholarly journals Perovskite solar cells with CuSCN hole extraction layers yield stabilized efficiencies greater than 20%

Science ◽  
2017 ◽  
Vol 358 (6364) ◽  
pp. 768-771 ◽  
Author(s):  
Neha Arora ◽  
M. Ibrahim Dar ◽  
Alexander Hinderhofer ◽  
Norman Pellet ◽  
Frank Schreiber ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Spacer Layer ◽  
Reduced Graphene ◽  
Hole Transporting ◽  
Solar Intensity ◽  
Power Point ◽  
The Stability ◽  
Carrier Extraction

Perovskite solar cells (PSCs) with efficiencies greater than 20% have been realized only with expensive organic hole-transporting materials. We demonstrate PSCs that achieve stabilized efficiencies exceeding 20% with copper(I) thiocyanate (CuSCN) as the hole extraction layer. A fast solvent removal method enabled the creation of compact, highly conformal CuSCN layers that facilitate rapid carrier extraction and collection. The PSCs showed high thermal stability under long-term heating, although their operational stability was poor. This instability originated from potential-induced degradation of the CuSCN/Au contact. The addition of a conductive reduced graphene oxide spacer layer between CuSCN and gold allowed PSCs to retain >95% of their initial efficiency after aging at a maximum power point for 1000 hours under full solar intensity at 60°C. Under both continuous full-sun illumination and thermal stress, CuSCN-based devices surpassed the stability of spiro-OMeTAD–based PSCs.

Enhanced long-term stability of perovskite solar cells by 3-hydroxypyridine dipping

2017 ◽  
Vol 53 (11) ◽  
pp. 1829-1831 ◽  
Author(s):  
Rui Fu ◽  
Yicheng Zhao ◽  
Qi Li ◽  
Wenke Zhou ◽  
Dapeng Yu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Maximum Power ◽  
Maximum Power Point ◽  
Term Stability ◽  
Long Term Stability ◽  
Power Point

With 3-HP treatment, perovskite solar cells can give a steady and long-term output at maximum power point for more than 50 hours.

Reliable Performance Comparison of Perovskite Solar Cells Using Optimized Maximum Power Point Tracking (Solar RRL 2∕2019)

Solar RRL ◽  
2019 ◽  
Vol 3 (2) ◽  
pp. 1970024
Author(s):  
Lucija Rakocevic ◽  
Felix Ernst ◽  
Nadine T. Yimga ◽  
Saumye Vashishtha ◽  
Tom Aernouts ◽  
...  
Keyword(s):  
Solar Cells ◽  
Maximum Power Point Tracking ◽  
Perovskite Solar Cells ◽  
Performance Comparison ◽  
Maximum Power ◽  
Maximum Power Point ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Reliable Performance ◽  
Power Point

Reliable Performance Comparison of Perovskite Solar Cells Using Optimized Maximum Power Point Tracking

Solar RRL ◽  
2019 ◽  
Vol 3 (2) ◽  
pp. 1800287 ◽  
Author(s):  
Lucija Rakocevic ◽  
Felix Ernst ◽  
Nadine T. Yimga ◽  
Saumye Vashishtha ◽  
Tom Aernouts ◽  
...  
Keyword(s):  
Solar Cells ◽  
Maximum Power Point Tracking ◽  
Perovskite Solar Cells ◽  
Performance Comparison ◽  
Maximum Power ◽  
Maximum Power Point ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Reliable Performance ◽  
Power Point

Research progress of atomic layer deposition technology to improve the long-term stability of perovskite solar cells

2021 ◽  
Author(s):  
Yifan Yang ◽  
Yujing Zhang ◽  
Luyun BAI ◽  
Davy Maurice MALOUANGOU ◽  
Jadel MATONDO TSIBA ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Atomic Layer ◽  
Research Progress ◽  
Long Term Stability ◽  
The Past ◽  
Hybrid Perovskite ◽  
Layer Deposition ◽  
Deposition Technology

In the past decade, organic-inorganic hybrid perovskite solar cells have developed rapidly and are now marching towards the stage of commercialization. In the process of developing perovskite solar cells, researchers...

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