Perovskite Photovoltaics Excitement
September 21, 2015 | IDTechExEstimated reading time: 2 minutes
Perovskite photovoltaics efficiency gains are double those of organic PV, exciting researchers from KIMM in Korea to Dyesol in Australia. However, it is like the little girl, "When she was good she was very, very good and when she was bad she was awful". Perovoskite photovoltaics promises over 20% efficiency, low cost materials and even flexible, transparent and stretchable versions dearly needed for new applications. Record power to weight ratio is needed for the electric vehicle end game, the land vehicles, boats and aircraft described in the IDTechEx report, Energy Independent Vehicles 2016-2026.
Ultrathin, flexible, stretchable and lightweight versions have been produced by Johannes Kepler University in Austria powering a miniature aircraft and airship. With 100% yield, exhibiting 12% efficiency they are only 3μm thick and weigh 5.2g m-3. Organolead halide perovskites are promising because they absorb light more efficiently: thinner layers are needed. Researchers suggest it could power EIVs as robotic insects and drones, and its flexibility and stretchability could be useful in bio-electronics.
But when she was bad she was awful. PbI, one of the breakdown products of the perovskite, is both toxic and carcinogenic. A glass panel can be made hermetically sealed, but plastics can be easily pierced. We need a barrier layer to make flexible versions last for 5- 10 years, and yet still not be that much heavier and even then it will not be chewable by children as required for packaging and toys. OPV will be better for that.
The new IDTechEx report, The Rise of Perovskite Solar Cells 2015-2025 External Link finds that the stability of perovskite cells under ambient conditions is a persistent problem. The perovskite decomposes in the presence of water and the decay products attack metal electrodes. Heavy encapsulation to protect perovskite can add to the cell cost and weight. Water vapour penetrating the perovskite can produce reactive iodides that rapidly corrode the metal electrodes.
Progress is being made. New perovskite solar cells with 16% efficiency have been developed by researchers from Switzerland and China. Stable and moisture resistant, they overcome some of the problems of perovskites. An interlayer protects the metal, allowing the cells to preserve their efficiency for two days. The resulting solar cell has greatly enhanced stability because of stabilising crosslinks in the material. These are formed by the phosphonic acid ammonium additive hooking together the perovskite crystallites through strong hydrogen bonding with the phosphorus and nitrogen-containing terminal groups of the linker molecule. The team explains that the additive allows the perovskite to be incorporated uniformly within and on the surface of a mesoporous titanium dioxide scaffold material. This nearly doubles the efficiency from 8.8 to 16.7% and it makes it moisture resistant, as the cations passivate the surface and render it inaccessible to water molecules. Next, the hysteresis in the J-V curves will be removed enhancing efficiency.
On the other hand, IDTechEx advises that lead free perovskites in photovoltaics have very low efficiency but the many other benefits may find them a market slot and they will be improved in efficiency in due course. All this will be covered by IMEC of Belgium, IDTechEx and others in presentations and masterclasses at the IDTechEx Show! External Link November 18-19 in Santa Clara California. It has 3000 paying delegates, 250 exhibitors and 23 masterclasses. Eight parallel conferences include "Energy Harvesting and Storage", "Photovoltaics" and "Electric Vehicles: Everything is Changing".
Suggested Items
LITEON Technology Reports Consolidated April Sales of NT$13.4 Billion Up 27% YoY
05/09/2025 | LITEON TechnologyLITEON Technology reported its April consolidated revenue of NT$13.4 billion. Thanks to the growth from power management in cloud computing, advanced server, and networking, the revenue is up 27% YoY.
It’s Only Common Sense Mastering the Follow-Up—The Key to Closing More Deals
05/05/2025 | Dan Beaulieu -- Column: It's Only Common SenseThere’s a saying in sales: The fortune is in the follow-up. If there’s one piece of advice every sales professional must take to heart, it’s that following up isn’t optional. Follow-up is an art and science that separates the mediocre from the masterful. Many salespeople give up after the first attempt to reach a potential customer, leaving money on the table. Mastering the follow-up is about strategy, persistence, and adding value. These key elements make follow-ups effective:
KYZEN to Spotlight Stencil Cleaning Solutions at SMTA Oregon
05/02/2025 | KYZEN'KYZEN, the global leader in innovative environmentally friendly cleaning chemistries, will exhibit at the SMTA Oregon Expo & Tech Forum, scheduled to take place on Tuesday, May 20 at the Wingspan Event and Conference Center in Hillsboro, OR. KYZEN’s cleaning expert Jeff Deering will be on-site at the expo providing information about stencil cleaning chemistries, including KYZEN E5631J.
IPC Strengthens Global Leadership Team with Addition of Joe Schneider as Vice President of U.S/Canada
04/25/2025 | IPCIPC, the global electronics association, announces the strategic appointment of Joe Schneider as vice president of U.S./Canada. This newly created executive position underscores the association’s commitment to championing the electronics industry's critical contributions to this region’s innovation and economic growth.
NCAB Acquires 100% of B&B Leiterplattenservice GmbH in Germany
04/23/2025 | NCABNCAB has signed an agreement to acquire 100 percent of B&B Leiterplattenservice GmbH (B&B) headquartered in Mittweida, west of Dresden. The company had net sales of around 150 MSEK in 2024 within the PCB trading with an EBITA exceeding SEK 20 million.