TECHNOLOGY FOCUS - CERAMICS AND GLASS - Preferred Components: The glass particles have a glass softening point of less than or equal to 650 degrees C and a crystallization initiation temperature of greater than or equal to 650 degrees C.    TECHNOLOGY FOCUS - METALLURGY - Preferred Composition: The paste composition (C1) further comprises silver particles. The composition (C1) comprises the total content of the phosphorus-tin-containing copper alloy particles and the silver particles (70-94 mass%), a content of the glass particles (0.1-10 mass%), and a total content of the solvent and the resin (3-29.9 mass%). Preferred Element: In the photovoltaic cell element (A1), the electrode comprises Cu-Sn alloy phase and Sn-P-O glass phase. The Sn-P-O glass phase is positioned between the Cu-Sn alloy phase and the silicon substrate. Preferred Components: The content of phosphorus in the phosphorus-tin-containing copper alloy particles is 2-15 mass%, and a content of tin in the phosphorus-tin-containing copper alloy particles is 5-30 mass%. The content of the metal atom in the phosphorus-tin-containing copper alloy particles is 0.1-10 mass %. The content of the silver particles (0.1-10 mass%) in a total content of the phosphorus-tin-containing copper alloy particles and the silver particles, which is defined as 100 mass%. The phosphorus-tin-containing copper alloy particles further comprise at least one metal atom selected from silver, manganese and cobalt. EXAMPLE - Phosphorus-tin-containing copper alloy particles containing phosphorus (6 mass%) and tin (10 mass%) were prepared, and were melted and powderized by a water atomization process. The obtained powder was dried and classified. The classified powder was blended, and was subjected to deoxidation and dehydration treatments, where phosphorus-tin-containing copper alloy particles that contain phosphorus (6 mass%) and tin (10 mass%) were prepared. The particle size (D50%) of the phosphorus-tin-containing copper alloy particles was 5 mu m, and the shape was quasispherical. A glass (G1) composed of silicon dioxide (3 parts), lead oxide (60 parts), boron oxide (18 parts), bismuth oxide (5 parts), aluminum oxide (5 parts), and zinc oxide (9 parts) was prepared. The obtained (G1) had a softening point of 420 degrees C, and the crystallization temperature was above 650 degrees C. With the obtained (G1), particles having a particle size (D50%) of 2.5 mu m were produced. The shape of the particles was quasispherical. The obtained phosphorus-tin-containing copper alloy particles (81.4 parts), (G1) particles (4.1 parts), terpineol (14.1 parts), and ethylcellulose (0.4 parts) were blended and milled in an agate mortar for 20 minutes, by preparing a paste composition for an electrode.