Intermediate film for laminated glass, and laminated glass

An interlayer film for laminated glass comprising a light emitting layer containing a polyvinyl acetal, a plasticizer, a light emitting material having a terephthalic acid ester structure, a potassium salt, and optionally a magnesium element,

• wherein:
• the polyvinyl acetal has 40 to 85 mol % of a degree of acetalization, 15 to 35 mol % of hydroxyl group content and 0.2 to 30 mol % of acetyl group content,
• the light emitting material having a terephthalic acid ester structure is diethyl-2,5-dihydroxy terephthalate, dimethyl-2,5-dihydroxy terephthalate or diethyl-2,5-diamino terephthalate,
• the potassium salt is potassium formate, potassium acetate, potassium acetate in combination with potassium 2-ethylhexanoate, or potassium propionate,
• the potassium element content of the light emitting layer is 50 ppm to 300 ppm,
• the magnesium element content of the light emitting layer is 40 ppm or less,
• the light emitting layer comprises 0.001 to 5 parts by weight of light emitting material having a terephthalic acid ester structure for 100 parts by weight of polyvinyl acetal,
• the light emitting layer comprises 20 to 80 parts by weight of the plasticizer for 100 parts by weight of polyvinyl acetal,
• the thickness of the light emitting layer is 300 to 2000 μm, and
• when the interlayer film is inserted between two clear glass plates having a thickness of 2.5 mm, the resulting laminated glass has a yellow index (YI) value which is determined with a spectrophotometer in accordance with JIS Z 8722 of 15 or less.