When the temperature increases, the cut-in voltage goes down. This makes it easier for electricity to pass through the diode.
w ɛ n WORD_BOUNDARY ð ə WORD_BOUNDARY t ɛ m p ɹ ɪ t̠ʃ ə ɹ ɹ WORD_BOUNDARY ɪ ŋ k ɹ iː s ɪ z WORD_BOUNDARY ð ə WORD_BOUNDARY k ʌ t ɪ n WORD_BOUNDARY v oʊ l t ɪ d̠ʒ WORD_BOUNDARY ɡ oʊ z WORD_BOUNDARY d aʊ n WORD_BOUNDARY ð ɪ s WORD_BOUNDARY m eɪ k s WORD_BOUNDARY ɪ t WORD_BOUNDARY iː z i ə ɹ WORD_BOUNDARY f ɔ ɹ WORD_BOUNDARY ɪ l ɛ k t ɹ ɪ s ɪ t i WORD_BOUNDARY t ə WORD_BOUNDARY p æ s WORD_BOUNDARY θ ɹ uː WORD_BOUNDARY ð ə WORD_BOUNDARY d aɪ oʊ d WORD_BOUNDARY