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Contents List

Join the surge in solid-state cooling by reading the latest, most thorough report on the subject. The commercially-oriented 535-page report is Zhar Research “Solid State Cooling Materials, Systems: Passive Radiative, PDRC, Caloric, Thermoelectric, Metamaterial, Conductor, Multimode, Multipurpose: Markets, Technology 2027-2047”. It assists all in the emerging value chain, particularly intending materials and device suppliers, product and system integrators and investors. Its eight chapters include 11 SWOT appraisals, roadmaps 31 forecast lines and 39 new infograms.

The primary author provides PhD level analysis, including implications of major research and company advances through 2026. He speaks from a background of creating several successful companies. His research finds a $67 billion market arriving over the next 20 years from only $1 billion today. Most will consist of three complementary technology families – passive radiative cooling also known as passive daylight radiative cooling, caloric cooling and thermoelectric cooling.

Recently, PRC and caloric cooling have been boosted by major technical advances and 3M products. Thermoelectric cooling is now boosted by meeting new needs such as Sony cooling wearables and others cooling the new 1kW microchips. Next come such things as coping with global warming, very hot AI datacenters, hotter 6G Communications, hot solar panels. Solid-state cooling will gradually displace vapor compression cooling in buildings, vehicles, refrigerators and freezers for a host of identified reasons. They include using less electricity, creating less or no heat by- product, cost, size and toxigen reduction.

The Executive Summary and Conclusions (48 pages) is complete for those with limited time. See basics, winning materials, company analysis, 24 primary conclusions, most SWOT appraisals, then roadmaps and 31 lines of forecasts 2027-2047.  The Introduction (35 pages) then explains the many needs arriving to demand solid-state cooling. See the big picture such as the trend to smart materials including textiles and your opportunity to replace undesirable materials. Many new infograms and tables pull this together including one giving twelve solid-state cooling operating principles compared by 10 capabilities.

Chapter 3. Passive Radiative Cooling (PRC)/ Passive Daylight Radiative Cooling (PDRC) and Allied Topics takes 105 pages because it enjoys the most advances in 2025 and 2026 – here examined in detail - and has very broad potential mainly beyond replacing or reducing vapor compression cooling. Here are many pie charts and SWOT appraisals and a full explanation of variants and combinations  overcoming limitations such as directionality. Chapter 4. Twelve Companies Commercialising PRC (37 pages) supports this including profiles of the PRC activity of giant companies such as 3M now involved. Its 3M™ Passive Radiative Cooling Film (PRCF) is a high-tech material that cools surfaces without electricity. It works 24/7 by reflecting 94% of sunlight and sending trapped heat into the cold upper atmosphere. This lowers surface temperatures and saves 10-20% on HVAC energy costs. Datacenter roofing is one beneficiary.

Chapter 5. Solid-State Phase Change Cooling: Caloric and OCPCM (111 pages) introduces phase change cooling and the solid-state part which is most promising with caloric cooling (change of ferroic state) but a new supporting technology called Oriented Composite Phase Change Material (OCPCM) is briefly covered – a directional thermal conductor. See the present and future of magnetocaloric, electrocaloric and mechanocaloric options (of which elastocaloric and barocaloric are most important). Magnetocaloric has long been commercialised with modest success but the research and company emphasis has pivoted to the others recently. Why, what next, what are your opportunities as it takes off? Why is $40 billion in sales likely by 2047 as caloric takes a major bite out of vapor compression cooling business? The small number of manufacturers discussed will now rise sharply.

Chapter 6. Enabling Technology: Metamaterial Cooling Materials and Devices (60 pages) shows how these mainly support PRC with something beyond simple thermal conduction or insulation. Understand the benefits such as transparency, efficiency and compactness and what comes next. This virtuosity extends to smart windows and greenhouses, cooling buildings and devices including solar panels and even metamaterial textiles. Eight important 2026 research papers examined are just a part of this.

Chapter 7. Thermoelectric Cooling and Thermoelectric Harvesting as a User of and Power Provider for Other Solid-State Cooling (58 pages) explains why it would be wrong to dismiss thermoelectrics as mature and of no importance. Why has Sony just entered the field with volume products? 2025-6 research breakthroughs? 82 manufacturers named? It is all here. Part of the story is major new needs best served by thermoelectric cooling such as some personal and 1kW chip cooling. Add possible future breakthroughs in research such as affordable wide-area and nano versions.

The report closes with Chapter 8. Thermal Interface Materials TIM and Other Thermal Conducting Materials and Structures (53 pages). These do not create cold but they support solid-state cooling by carrying heat away. The Zhar Research report is your best guide to participating early in this exciting opportunity becoming tens of billions of dollars yearly.