Recently, white light emitting diodes (LEDs) have been applied widely in many fields, such as auto lamp, LCD screen, the landscape lighting and other emerging areas 1-3. They have attracted much attention due to their small size, high luminous reliability, long lifetime, low energy consumption and environment-friendly characteristics 4. The most efficient method to obtain the white light is phosphor-converted. Nevertheless, the traditional red-emitting phosphor used for LED shows a rather low red emission under near-UV light excitation 5. Therefore, it is indispensable to seek novel red phosphors that can be effectively excited by near-UV light. Double molybdates AB(MoO4)2 (A